diff --git a/code/__HELPERS/time.dm b/code/__HELPERS/time.dm
index cfd9da96cee15..cef23857bc7a0 100644
--- a/code/__HELPERS/time.dm
+++ b/code/__HELPERS/time.dm
@@ -22,7 +22,7 @@
 	//International Fixed Calendar format (https://en.wikipedia.org/wiki/International_Fixed_Calendar)
 	var/days_since = round(realtime / (24 HOURS))
 	var/year = round(days_since / 365) + 481
-	var/day_of_year = days_since % 365 + 1
+	var/day_of_year = days_since % 365
 	var/month = round(day_of_year / 28)
 	var/day_of_month = day_of_year % 28 + 1