diff --git a/app/controllers/users/headmaps_controller.rb b/app/controllers/users/headmaps_controller.rb
index 83efd99fb..15ce56769 100644
--- a/app/controllers/users/headmaps_controller.rb
+++ b/app/controllers/users/headmaps_controller.rb
@@ -2,6 +2,16 @@ class Users::HeadmapsController < Users::BaseController
   def index 
     result = Gitea::User::HeadmapService.call(observed_user.login, start_stamp, end_stamp, observed_user&.gitea_token)
     @headmaps = result[2].blank? ? [] : result[2]
+    headmaps_result = {}
+    @headmaps.each do |entry|
+      date = Time.at(entry["timestamp"]).strftime("%Y-%m-%d")
+      if headmaps_result[date].nil?
+        headmaps_result[date] = { "contributions" => entry["contributions"] }
+      else
+        headmaps_result[date]["contributions"] += entry["contributions"]
+      end
+    end
+    @headmaps = headmaps_result
   rescue Exception => e
     uid_logger_error(e.message)
     tip_exception(e.message)
@@ -18,9 +28,9 @@ class Users::HeadmapsController < Users::BaseController
 
   def end_stamp 
     if params[:year].present?
-      (Date.new(params[:year].to_i, 1) + 1.years).to_time.to_i
+      (Date.new(params[:year].to_i, 1) + 1.years).to_time.end_of_day.to_i
     else 
-      Date.today.to_time.to_i 
+      Date.today.to_time.end_of_day.to_i 
     end
   end
 end
\ No newline at end of file
diff --git a/app/views/users/headmaps/index.json.jbuilder b/app/views/users/headmaps/index.json.jbuilder
index 0e6a540b5..30f3ff4b4 100644
--- a/app/views/users/headmaps/index.json.jbuilder
+++ b/app/views/users/headmaps/index.json.jbuilder
@@ -1,5 +1,5 @@
-json.total_contributions @headmaps.collect{|map| map["contributions"]}.reduce(0, :+)
-json.headmaps @headmaps.each do |map|
-  json.date Time.at(map["timestamp"].to_i).strftime("%Y-%m-%d")
-  json.contributions map["contributions"]
+json.total_contributions @headmaps.collect{|k, value| value["contributions"]}.reduce(0, :+)
+json.headmaps @headmaps.each do |k, value|
+  json.date k
+  json.contributions value["contributions"]
 end