--- a/src/html.h	Fri Jan 31 22:27:28 2025 +0100
+++ b/src/html.h	Fri Jan 31 22:48:43 2025 +0100
@@ -26,6 +26,7 @@
 #define HTML_H
 
 #include <string>
+#include <chrono>
 
 namespace html {
 
@@ -41,7 +42,7 @@
     void row_begin(unsigned int weekday);
     void row_end();
     void cell_out_of_range();
-    void cell(unsigned commits);
+    void cell(std::chrono::year_month_day ymd, unsigned commits);
 
 }