diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69803428a..a5610db7f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ The format is based on [keep a changelog](http://keepachangelog.com) and this pr
 - Ensure persisted chat messages listing returns correct order.
 - Return correct tournament details in console API leaderboard details endpoint.
 - Do not report invalid http RPC ids to prometheus counts.
+- Fix Lua runtime short day format option.
 
 ## [3.25.0] - 2024-11-25
 ### Added
diff --git a/server/runtime_lua_utils.go b/server/runtime_lua_utils.go
index 80ad7b9a7..8d4a1f1e0 100644
--- a/server/runtime_lua_utils.go
+++ b/server/runtime_lua_utils.go
@@ -79,7 +79,7 @@ func (fs *flagScanner) Next() (byte, bool) {
 }
 
 var cDateFlagToGo = map[byte]string{
-	'a': "mon", 'A': "Monday", 'b': "Jan", 'B': "January", 'c': "02 Jan 06 15:04 MST", 'd': "02",
+	'a': "Mon", 'A': "Monday", 'b': "Jan", 'B': "January", 'c': "02 Jan 06 15:04 MST", 'd': "02",
 	'F': "2006-01-02", 'H': "15", 'I': "03", 'm': "01", 'M': "04", 'p': "PM", 'P': "pm", 'S': "05",
 	'x': "15/04/05", 'X': "15:04:05", 'y': "06", 'Y': "2006", 'z': "-0700", 'Z': "MST"}