diff --git a/assets/js/components/GitContributionChart.vue b/assets/js/components/GitContributionChart.vue
index 086556b..277f261 100644
--- a/assets/js/components/GitContributionChart.vue
+++ b/assets/js/components/GitContributionChart.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="git-contribution-chart">
     <div class="flex justify-between align-items-center mb-4">
-      <h3 class="text-lg font-semibold m-0">Contributions im letzten Jahr</h3>
+      <h3 class="text-lg font-semibold m-0">Contributions {{ currentYear }}</h3>
       <div v-if="!loading && totalContributions > 0" class="text-500">
         <i class="pi pi-calendar mr-2"></i>
         {{ totalContributions }} Commits
@@ -17,48 +17,70 @@
       <p class="text-500">{{ error }}</p>
     </div>
 
-    <div v-else-if="contributionData.length === 0" class="p-4 border-round surface-border border-1 text-center">
-      <i class="pi pi-info-circle text-blue-500 text-3xl mb-2"></i>
-      <p class="text-500">Keine Contributions im letzten Jahr</p>
-    </div>
-
-    <div v-else>
-      <!-- Heatmap-style visualization (similar to GitHub) -->
-      <div class="contribution-heatmap">
-        <div class="heatmap-grid">
-          <div
-            v-for="week in contributionData"
-            :key="week.week"
-            class="heatmap-cell"
-            :class="getIntensityClass(week.count)"
-            :title="`KW ${week.weekNumber} ${week.year}: ${week.count} Commits`"
-          >
-            <span class="cell-count">{{ week.count }}</span>
+    <div v-else-if="contributionGrid.length > 0" class="contribution-heatmap">
+      <div class="heatmap-wrapper">
+        <!-- Month labels -->
+        <div class="month-labels-row">
+          <div class="weekday-spacer"></div>
+          <div class="month-labels">
+            <div 
+              v-for="(month, index) in monthLabels"
+              :key="index"
+              :style="{ gridColumn: `${month.startCol} / span ${month.colSpan}` }"
+              class="month-label"
+            >
+              {{ month.label }}
+            </div>
           </div>
         </div>
 
-        <div class="legend mt-3 flex gap-2 align-items-center justify-end">
-          <span class="text-sm text-500">Weniger</span>
-          <div class="legend-cell level-0"></div>
-          <div class="legend-cell level-1"></div>
-          <div class="legend-cell level-2"></div>
-          <div class="legend-cell level-3"></div>
-          <div class="legend-cell level-4"></div>
-          <span class="text-sm text-500">Mehr</span>
+        <!-- Grid with weekday labels -->
+        <div class="grid-container">
+          <!-- Weekday labels on the left -->
+          <div class="weekday-labels">
+            <div class="weekday-label"></div>
+            <div class="weekday-label">Mo</div>
+            <div class="weekday-label"></div>
+            <div class="weekday-label">Mi</div>
+            <div class="weekday-label"></div>
+            <div class="weekday-label">Fr</div>
+            <div class="weekday-label"></div>
+          </div>
+
+          <!-- Heatmap grid -->
+          <div class="heatmap-grid">
+            <div 
+              v-for="(day, index) in contributionGrid"
+              :key="index"
+              :class="['contribution-cell', getIntensityClass(day.count)]"
+              :style="{ gridRow: day.row, gridColumn: day.col }"
+              :title="day.tooltip"
+            >
+            </div>
+          </div>
         </div>
       </div>
-
-      <!-- Bar Chart alternative -->
-      <div class="mt-4">
-        <Chart type="bar" :data="chartData" :options="chartOptions" class="h-20rem" />
+      
+      <div class="legend mt-3 flex gap-2 align-items-center justify-end">
+        <span class="text-sm text-500">Weniger</span>
+        <div class="legend-cell intensity-0"></div>
+        <div class="legend-cell intensity-1"></div>
+        <div class="legend-cell intensity-2"></div>
+        <div class="legend-cell intensity-3"></div>
+        <div class="legend-cell intensity-4"></div>
+        <span class="text-sm text-500">Mehr</span>
       </div>
     </div>
+
+    <div v-else class="p-4 border-round surface-border border-1 text-center text-500">
+      <i class="pi pi-info-circle text-3xl mb-2"></i>
+      <p>Keine Contributions für {{ currentYear }} gefunden</p>
+    </div>
   </div>
 </template>
 
 <script setup>
 import { ref, computed, onMounted, watch } from 'vue'
-import Chart from 'primevue/chart'
 import { useToast } from 'primevue/usetoast'
 
 const props = defineProps({
@@ -73,6 +95,10 @@ const props = defineProps({
   author: {
     type: String,
     default: null
+  },
+  year: {
+    type: Number,
+    default: null
   }
 })
 
@@ -80,20 +106,139 @@ const toast = useToast()
 const contributionData = ref([])
 const loading = ref(false)
 const error = ref(null)
+const currentYear = computed(() => props.year || new Date().getFullYear())
 
 const totalContributions = computed(() => {
-  return contributionData.value.reduce((sum, week) => sum + week.count, 0)
+  return contributionData.value.reduce((sum, day) => sum + day.count, 0)
+})
+
+const contributionGrid = computed(() => {
+  if (contributionData.value.length === 0) return []
+  
+  const grid = []
+  const firstDay = new Date(currentYear.value, 0, 1)
+  
+  // Find the first Sunday on or before January 1st to start the grid
+  const firstSunday = new Date(firstDay)
+  while (firstSunday.getDay() !== 0) {
+    firstSunday.setDate(firstSunday.getDate() - 1)
+  }
+  
+  // Create a map of dates to contribution counts
+  const contributionMap = {}
+  contributionData.value.forEach(day => {
+    contributionMap[day.date] = day.count
+  })
+  
+  // Debug: Log contribution map
+  console.log('Contribution map sample:', Object.entries(contributionMap).slice(0, 10))
+  
+  let col = 1
+  let currentDate = new Date(firstSunday)
+  const lastDay = new Date(currentYear.value, 11, 31)
+  
+  while (currentDate <= lastDay || currentDate.getDay() !== 0) {
+    const dateStr = currentDate.toISOString().split('T')[0]
+    const weekday = currentDate.getDay() // 0 = Sunday, 6 = Saturday
+    const row = weekday + 1 // Grid row: 1-7 (Sunday-Saturday)
+    
+    // Only add cells for the current year
+    if (currentDate.getFullYear() === currentYear.value) {
+      const count = contributionMap[dateStr] || 0
+      const date = new Date(currentDate)
+      
+      grid.push({
+        date: dateStr,
+        count: count,
+        row: row,
+        col: col,
+        tooltip: `${count} ${count === 1 ? 'Commit' : 'Commits'} am ${formatDateShort(date)}`
+      })
+    } else if (currentDate < firstDay) {
+      // Placeholder for days before the year starts
+      grid.push({
+        date: dateStr,
+        count: -1, // Special value for empty placeholder
+        row: row,
+        col: col,
+        tooltip: ''
+      })
+    }
+    
+    // Move to next column on Saturday
+    if (weekday === 6) {
+      col++
+    }
+    
+    currentDate.setDate(currentDate.getDate() + 1)
+  }
+  
+  // Debug: Log grid sample
+  const gridWithCommits = grid.filter(g => g.count > 0)
+  console.log('Grid cells with commits:', gridWithCommits.length)
+  console.log('Sample cells with commits:', gridWithCommits.slice(0, 5))
+  
+  return grid
+})
+
+const monthLabels = computed(() => {
+  if (contributionGrid.value.length === 0) return []
+  
+  const labels = []
+  const months = [
+    { name: 'Jan', index: 0 },
+    { name: 'Feb', index: 1 },
+    { name: 'Mär', index: 2 },
+    { name: 'Apr', index: 3 },
+    { name: 'Mai', index: 4 },
+    { name: 'Jun', index: 5 },
+    { name: 'Jul', index: 6 },
+    { name: 'Aug', index: 7 },
+    { name: 'Sep', index: 8 },
+    { name: 'Okt', index: 9 },
+    { name: 'Nov', index: 10 },
+    { name: 'Dez', index: 11 }
+  ]
+  
+  const firstDayOfYear = new Date(currentYear.value, 0, 1)
+  const firstSunday = new Date(firstDayOfYear)
+  while (firstSunday.getDay() !== 0) {
+    firstSunday.setDate(firstSunday.getDate() - 1)
+  }
+  
+  months.forEach(month => {
+    const firstDayOfMonth = new Date(currentYear.value, month.index, 1)
+    const daysSinceFirstSunday = Math.floor((firstDayOfMonth - firstSunday) / (1000 * 60 * 60 * 24))
+    const col = Math.floor(daysSinceFirstSunday / 7) + 1
+    
+    // Calculate how many weeks this month spans
+    const lastDayOfMonth = new Date(currentYear.value, month.index + 1, 0)
+    const daysSinceFirstSundayEnd = Math.floor((lastDayOfMonth - firstSunday) / (1000 * 60 * 60 * 24))
+    const endCol = Math.floor(daysSinceFirstSundayEnd / 7) + 1
+    const colSpan = Math.max(1, endCol - col + 1)
+    
+    // Only show month label if there's enough space (at least 2 columns)
+    if (colSpan >= 2) {
+      labels.push({
+        label: month.name,
+        startCol: col,
+        colSpan: colSpan
+      })
+    }
+  })
+  
+  return labels
 })
 
 const chartData = computed(() => {
-  const labels = contributionData.value.map(w => `KW ${w.weekNumber}`)
-  const data = contributionData.value.map(w => w.count)
+  const labels = contributionData.value.map(d => d.date)
+  const data = contributionData.value.map(d => d.count)
 
   return {
     labels,
     datasets: [
       {
-        label: 'Commits pro Woche',
+        label: 'Commits pro Tag',
         data,
         backgroundColor: '#10b981',
         borderColor: '#059669',
@@ -141,7 +286,7 @@ onMounted(() => {
   loadContributions()
 })
 
-watch(() => [props.repositoryId, props.branch, props.author], () => {
+watch(() => [props.repositoryId, props.branch, props.author, props.year], () => {
   loadContributions()
 })
 
@@ -150,7 +295,7 @@ async function loadContributions() {
   error.value = null
 
   try {
-    let url = `/api/git-repos/${props.repositoryId}/contributions?branch=${props.branch}`
+    let url = `/api/git-repos/${props.repositoryId}/contributions?branch=${props.branch}&year=${currentYear.value}`
     if (props.author) {
       url += `&author=${encodeURIComponent(props.author)}`
     }
@@ -164,6 +309,11 @@ async function loadContributions() {
 
     const data = await response.json()
     contributionData.value = data.contributions || []
+    
+    // Debug: Log the data to check format
+    console.log('Contribution data received:', contributionData.value.slice(0, 5))
+    console.log('Total days:', contributionData.value.length)
+    console.log('Days with commits:', contributionData.value.filter(d => d.count > 0).length)
   } catch (err) {
     console.error('Error loading contributions:', err)
     error.value = err.message
@@ -180,11 +330,27 @@ async function loadContributions() {
 }
 
 function getIntensityClass(count) {
-  if (count === 0) return 'level-0'
-  if (count <= 2) return 'level-1'
-  if (count <= 5) return 'level-2'
-  if (count <= 10) return 'level-3'
-  return 'level-4'
+  if (count < 0) return 'intensity-empty' // Placeholder cells
+  if (count === 0) return 'intensity-0'
+  if (count <= 2) return 'intensity-1'
+  if (count <= 5) return 'intensity-2'
+  if (count <= 10) return 'intensity-3'
+  return 'intensity-4'
+}
+
+function formatDate(dateString) {
+  if (!dateString) return 'Invalid Date'
+  const date = new Date(dateString)
+  if (isNaN(date.getTime())) return 'Invalid Date'
+  return date.toLocaleDateString('de-DE', { day: '2-digit', month: '2-digit', year: 'numeric' })
+}
+
+function formatDateShort(date) {
+  return date.toLocaleDateString('de-DE', { 
+    day: 'numeric', 
+    month: 'short',
+    year: 'numeric'
+  })
 }
 
 defineExpose({
@@ -198,66 +364,111 @@ defineExpose({
 }
 
 .contribution-heatmap {
-  width: 100%;
+  margin-top: 1rem;
+}
+
+.heatmap-wrapper {
+  overflow-x: auto;
+  padding: 0.5rem 0;
+}
+
+.month-labels-row {
+  display: flex;
+  margin-bottom: 0.5rem;
+}
+
+.weekday-spacer {
+  width: 30px;
+  flex-shrink: 0;
+}
+
+.month-labels {
+  display: grid;
+  grid-auto-flow: column;
+  grid-auto-columns: 13px;
+  gap: 3px;
+  flex: 1;
+  margin-left: 3px;
+}
+
+.month-label {
+  font-size: 0.75rem;
+  color: var(--text-color-secondary);
+  text-align: left;
+}
+
+.grid-container {
+  display: flex;
+  gap: 3px;
+}
+
+.weekday-labels {
+  display: grid;
+  grid-template-rows: repeat(7, 13px);
+  gap: 3px;
+  width: 30px;
+  flex-shrink: 0;
+}
+
+.weekday-label {
+  font-size: 0.65rem;
+  color: var(--text-color-secondary);
+  display: flex;
+  align-items: center;
+  justify-content: flex-start;
+  height: 13px;
 }
 
 .heatmap-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(16px, 1fr));
+  grid-template-rows: repeat(7, 13px);
+  grid-auto-flow: column;
+  grid-auto-columns: 13px;
   gap: 3px;
-  max-width: 100%;
 }
 
-.heatmap-cell {
-  position: relative;
-  aspect-ratio: 1;
-  border-radius: 3px;
+.contribution-cell {
+  border-radius: 2px;
   cursor: pointer;
-  transition: all 0.2s;
+  transition: all 0.15s ease;
+  min-height: 13px;
+  min-width: 13px;
 }
 
-.heatmap-cell:hover {
-  transform: scale(1.2);
-  z-index: 10;
+.contribution-cell:not(.intensity-empty):hover {
+  outline: 2px solid rgba(0, 0, 0, 0.3);
+  outline-offset: 0;
 }
 
-.cell-count {
-  position: absolute;
-  top: 50%;
-  left: 50%;
-  transform: translate(-50%, -50%);
-  font-size: 10px;
-  font-weight: 600;
-  color: white;
-  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
-  opacity: 0;
-  transition: opacity 0.2s;
+.intensity-empty {
+  background-color: transparent;
+  cursor: default;
 }
 
-.heatmap-cell:hover .cell-count {
-  opacity: 1;
-}
-
-.level-0 {
+.intensity-0 {
   background-color: var(--surface-200);
 }
 
-.level-1 {
+.intensity-1 {
   background-color: #9be9a8;
 }
 
-.level-2 {
+.intensity-2 {
   background-color: #40c463;
 }
 
-.level-3 {
+.intensity-3 {
   background-color: #30a14e;
 }
 
-.level-4 {
+.intensity-4 {
   background-color: #216e39;
 }
 
+:global(.dark) .intensity-0 {
+  background-color: var(--surface-700);
+}
+
 .legend {
   display: flex;
   align-items: center;
@@ -268,24 +479,4 @@ defineExpose({
   height: 14px;
   border-radius: 2px;
 }
-
-.legend-cell.level-0 {
-  background-color: var(--surface-200);
-}
-
-.legend-cell.level-1 {
-  background-color: #9be9a8;
-}
-
-.legend-cell.level-2 {
-  background-color: #40c463;
-}
-
-.legend-cell.level-3 {
-  background-color: #30a14e;
-}
-
-.legend-cell.level-4 {
-  background-color: #216e39;
-}
 </style>
diff --git a/assets/js/views/ProjectManagement.vue b/assets/js/views/ProjectManagement.vue
index 70cbc1e..2711bc0 100644
--- a/assets/js/views/ProjectManagement.vue
+++ b/assets/js/views/ProjectManagement.vue
@@ -686,7 +686,7 @@
 
           <div v-else class="flex flex-col gap-4">
             <!-- Repository Selector -->
-            <div class="flex gap-3 align-items-center">
+            <div class="flex gap-3 align-items-center flex-wrap">
               <label class="font-medium">Repository:</label>
               <Select
                 v-model="selectedRepository"
@@ -702,6 +702,15 @@
                 placeholder="Branch (z.B. main)"
                 class="w-15rem"
               />
+              <label v-if="selectedRepository" class="font-medium">Jahr:</label>
+              <InputNumber
+                v-if="selectedRepository"
+                v-model="selectedYear"
+                :min="2000"
+                :max="2100"
+                :use-grouping="false"
+                class="w-10rem"
+              />
             </div>
 
             <!-- Contribution Chart -->
@@ -709,6 +718,7 @@
               <GitContributionChart
                 :repository-id="selectedRepository.id"
                 :branch="selectedBranch"
+                :year="selectedYear"
               />
             </div>
 
@@ -771,6 +781,7 @@ const statuses = ref([])
 const gitRepositories = ref([])
 const selectedRepository = ref(null)
 const selectedBranch = ref('main')
+const selectedYear = ref(new Date().getFullYear())
 
 // Git Repository Management
 const editGitRepositories = ref([])
diff --git a/src/Controller/GitRepositoryController.php b/src/Controller/GitRepositoryController.php
index df9b00b..6105c38 100644
--- a/src/Controller/GitRepositoryController.php
+++ b/src/Controller/GitRepositoryController.php
@@ -87,17 +87,19 @@ class GitRepositoryController extends AbstractController
         try {
             $branch = $request->query->get('branch', $gitRepo->getBranch() ?? 'main');
             $author = $request->query->get('author');
+            $year = (int)$request->query->get('year', date('Y'));
 
             // Choose service based on provider
             if ($gitRepo->getProvider() === 'github') {
-                $contributions = $this->getContributionsFromGitHub($gitRepo);
+                $contributions = $this->getContributionsFromGitHub($gitRepo, $year);
             } elseif ($gitRepo->getProvider() === 'gitea') {
-                $contributions = $this->getContributionsFromGitea($gitRepo, $branch, $author);
+                $contributions = $this->getContributionsFromGitea($gitRepo, $branch, $author, $year);
             } elseif ($gitRepo->getLocalPath()) {
                 $contributions = $this->gitService->getContributions(
                     $gitRepo->getLocalPath(),
                     $branch,
-                    $author
+                    $author,
+                    $year
                 );
             } else {
                 return $this->json([
@@ -117,6 +119,7 @@ class GitRepositoryController extends AbstractController
                     'provider' => $gitRepo->getProvider()
                 ],
                 'contributions' => $contributions,
+                'year' => $year,
                 'total' => array_sum(array_column($contributions, 'count'))
             ]);
         } catch (\Exception $e) {
@@ -126,16 +129,16 @@ class GitRepositoryController extends AbstractController
         }
     }
 
-    private function getContributionsFromGitHub(GitRepository $gitRepo): array
+    private function getContributionsFromGitHub(GitRepository $gitRepo, int $year): array
     {
         $parsed = GitHubService::parseGitHubUrl($gitRepo->getUrl());
-        return $this->githubService->getContributions($parsed['owner'], $parsed['repo']);
+        return $this->githubService->getContributions($parsed['owner'], $parsed['repo'], $year);
     }
 
-    private function getContributionsFromGitea(GitRepository $gitRepo, string $branch, ?string $author): array
+    private function getContributionsFromGitea(GitRepository $gitRepo, string $branch, ?string $author, int $year): array
     {
         $parsed = GiteaService::parseGiteaUrl($gitRepo->getUrl());
-        return $this->giteaService->getContributions($parsed['baseUrl'], $parsed['owner'], $parsed['repo'], $branch, $author);
+        return $this->giteaService->getContributions($parsed['baseUrl'], $parsed['owner'], $parsed['repo'], $branch, $author, $year);
     }
 
     #[Route('/{id}/branches', name: 'api_git_repo_branches', methods: ['GET'])]
diff --git a/src/Service/GitHubService.php b/src/Service/GitHubService.php
index 625328b..4b32baf 100644
--- a/src/Service/GitHubService.php
+++ b/src/Service/GitHubService.php
@@ -68,9 +68,16 @@ class GitHubService
      * @param string $repo Repository name
      * @return array Weekly contribution data
      */
-    public function getContributions(string $owner, string $repo): array
+    public function getContributions(string $owner, string $repo, ?int $year = null): array
     {
-        $url = sprintf('%s/repos/%s/%s/stats/commit_activity', self::GITHUB_API, $owner, $repo);
+        // GitHub's stats API only provides weekly data, so we need to use commits API
+        // to get daily granularity
+        $targetYear = $year ?? (int)date('Y');
+        $since = sprintf('%d-01-01T00:00:00Z', $targetYear);
+        $until = sprintf('%d-12-31T23:59:59Z', $targetYear);
+        
+        $url = sprintf('%s/repos/%s/%s/commits?since=%s&until=%s&per_page=100', 
+            self::GITHUB_API, $owner, $repo, $since, $until);
         
         $options = [];
         if ($this->githubToken) {
@@ -80,19 +87,49 @@ class GitHubService
         }
 
         try {
+            $dailyContributions = [];
+            
+            // Fetch commits (may need pagination for repositories with many commits)
             $response = $this->httpClient->request('GET', $url, $options);
-            $weeklyStats = $response->toArray();
-
-            return array_map(function ($week) {
-                $date = new \DateTime('@' . $week['week']);
-                return [
-                    'week' => $date->format('Y-W'),
-                    'year' => (int)$date->format('Y'),
-                    'weekNumber' => (int)$date->format('W'),
-                    'startDate' => $date->format('Y-m-d'),
-                    'count' => $week['total']
-                ];
-            }, $weeklyStats);
+            $commits = $response->toArray();
+            
+            // Group by day
+            foreach ($commits as $commit) {
+                if (isset($commit['commit']['author']['date'])) {
+                    $date = new \DateTime($commit['commit']['author']['date']);
+                    $dayKey = $date->format('Y-m-d');
+                    
+                    if (!isset($dailyContributions[$dayKey])) {
+                        $dailyContributions[$dayKey] = [
+                            'date' => $dayKey,
+                            'count' => 0,
+                            'weekday' => (int)$date->format('N')
+                        ];
+                    }
+                    
+                    $dailyContributions[$dayKey]['count']++;
+                }
+            }
+            
+            // Fill in missing days with 0 commits
+            $startDate = new \DateTime($since);
+            $endDate = new \DateTime($until);
+            
+            for ($date = clone $startDate; $date <= $endDate; $date->modify('+1 day')) {
+                $dayKey = $date->format('Y-m-d');
+                
+                if (!isset($dailyContributions[$dayKey])) {
+                    $dailyContributions[$dayKey] = [
+                        'date' => $dayKey,
+                        'count' => 0,
+                        'weekday' => (int)$date->format('N')
+                    ];
+                }
+            }
+            
+            ksort($dailyContributions);
+            return array_values($dailyContributions);
+            
         } catch (\Exception $e) {
             throw new \RuntimeException('Failed to fetch contribution stats from GitHub: ' . $e->getMessage());
         }
diff --git a/src/Service/GitService.php b/src/Service/GitService.php
index 515e629..7438ea6 100644
--- a/src/Service/GitService.php
+++ b/src/Service/GitService.php
@@ -74,14 +74,16 @@ class GitService
      * @param string|null $author Filter by author email (optional)
      * @return array Array of weekly contribution data
      */
-    public function getContributions(string $repositoryPath, string $branch = 'main', ?string $author = null): array
+    public function getContributions(string $repositoryPath, string $branch = 'main', ?string $author = null, ?int $year = null): array
     {
         if (!is_dir($repositoryPath) || !is_dir($repositoryPath . '/.git')) {
             throw new \InvalidArgumentException('Invalid Git repository path');
         }
 
-        // Get commits from the last year
-        $since = (new \DateTime())->modify('-1 year')->format('Y-m-d');
+        // Use specified year or current year
+        $targetYear = $year ?? (int)date('Y');
+        $since = sprintf('%d-01-01', $targetYear);
+        $until = sprintf('%d-12-31', $targetYear);
         
         $command = [
             'git',
@@ -90,7 +92,8 @@ class GitService
             'log',
             $branch,
             '--format=%aI',
-            '--since=' . $since
+            '--since=' . $since,
+            '--until=' . $until
         ];
 
         if ($author) {
@@ -107,30 +110,45 @@ class GitService
         $output = $process->getOutput();
         $dates = array_filter(explode("\n", trim($output)));
 
-        // Group commits by week
-        $weeklyContributions = [];
+        // Group commits by day
+        $dailyContributions = [];
         
         foreach ($dates as $dateString) {
             $date = new \DateTime($dateString);
-            $weekKey = $date->format('Y-W'); // Year-Week format
+            // Use Y-m-d format to match frontend expectation
+            $dayKey = $date->format('Y-m-d');
             
-            if (!isset($weeklyContributions[$weekKey])) {
-                $weeklyContributions[$weekKey] = [
-                    'week' => $weekKey,
-                    'year' => (int)$date->format('Y'),
-                    'weekNumber' => (int)$date->format('W'),
-                    'startDate' => $date->modify('monday this week')->format('Y-m-d'),
-                    'count' => 0
+            if (!isset($dailyContributions[$dayKey])) {
+                $dailyContributions[$dayKey] = [
+                    'date' => $dayKey,
+                    'count' => 0,
+                    'weekday' => (int)$date->format('N') // 1 = Monday, 7 = Sunday
                 ];
             }
             
-            $weeklyContributions[$weekKey]['count']++;
+            $dailyContributions[$dayKey]['count']++;
         }
 
-        // Sort by week
-        ksort($weeklyContributions);
+        // Fill in missing days with 0 commits to create complete year grid
+        $startDate = new \DateTime($since);
+        $endDate = new \DateTime($until);
+        
+        for ($date = clone $startDate; $date <= $endDate; $date->modify('+1 day')) {
+            $dayKey = $date->format('Y-m-d');
+            
+            if (!isset($dailyContributions[$dayKey])) {
+                $dailyContributions[$dayKey] = [
+                    'date' => $dayKey,
+                    'count' => 0,
+                    'weekday' => (int)$date->format('N')
+                ];
+            }
+        }
 
-        return array_values($weeklyContributions);
+        // Sort by date
+        ksort($dailyContributions);
+
+        return array_values($dailyContributions);
     }
 
     /**
diff --git a/src/Service/GiteaService.php b/src/Service/GiteaService.php
index 9ea4765..2eafff5 100644
--- a/src/Service/GiteaService.php
+++ b/src/Service/GiteaService.php
@@ -72,46 +72,60 @@ class GiteaService
      * @param string|null $author Filter by author email
      * @return array Weekly contribution data
      */
-    public function getContributions(string $baseUrl, string $owner, string $repo, string $branch = 'main', ?string $author = null): array
+    public function getContributions(string $baseUrl, string $owner, string $repo, string $branch = 'main', ?string $author = null, ?int $year = null): array
     {
         try {
+            $targetYear = $year ?? (int)date('Y');
+            
             // Fetch commits (Gitea limits to 50 per request, may need pagination for full year)
-            $commits = $this->getCommits($baseUrl, $owner, $repo, $branch, 50);
+            $commits = $this->getCommits($baseUrl, $owner, $repo, $branch, 100);
 
             // Filter by author if specified
             if ($author) {
                 $commits = array_filter($commits, fn($commit) => stripos($commit['email'], $author) !== false);
             }
 
-            // Group by week
-            $weeklyContributions = [];
-            $oneYearAgo = new \DateTime('-1 year');
+            // Group by day
+            $dailyContributions = [];
+            $yearStart = new \DateTime(sprintf('%d-01-01', $targetYear));
+            $yearEnd = new \DateTime(sprintf('%d-12-31', $targetYear));
 
             foreach ($commits as $commit) {
                 $date = new \DateTime($commit['date']);
                 
-                // Only include commits from last year
-                if ($date < $oneYearAgo) {
+                // Only include commits from target year
+                if ($date->format('Y') != $targetYear) {
                     continue;
                 }
 
-                $weekKey = $date->format('Y-W');
+                $dayKey = $date->format('Y-m-d');
                 
-                if (!isset($weeklyContributions[$weekKey])) {
-                    $weeklyContributions[$weekKey] = [
-                        'week' => $weekKey,
-                        'year' => (int)$date->format('Y'),
-                        'weekNumber' => (int)$date->format('W'),
-                        'startDate' => (clone $date)->modify('monday this week')->format('Y-m-d'),
-                        'count' => 0
+                if (!isset($dailyContributions[$dayKey])) {
+                    $dailyContributions[$dayKey] = [
+                        'date' => $dayKey,
+                        'count' => 0,
+                        'weekday' => (int)$date->format('N')
                     ];
                 }
                 
-                $weeklyContributions[$weekKey]['count']++;
+                $dailyContributions[$dayKey]['count']++;
+            }
+            
+            // Fill in missing days with 0 commits
+            for ($date = clone $yearStart; $date <= $yearEnd; $date->modify('+1 day')) {
+                $dayKey = $date->format('Y-m-d');
+                
+                if (!isset($dailyContributions[$dayKey])) {
+                    $dailyContributions[$dayKey] = [
+                        'date' => $dayKey,
+                        'count' => 0,
+                        'weekday' => (int)$date->format('N')
+                    ];
+                }
             }
 
-            ksort($weeklyContributions);
-            return array_values($weeklyContributions);
+            ksort($dailyContributions);
+            return array_values($dailyContributions);
         } catch (\Exception $e) {
             throw new \RuntimeException('Failed to fetch contribution stats from Gitea: ' . $e->getMessage());
         }