diff --git a/webif/lib/utils b/webif/lib/utils
index bab547c..53eaf04 100644
--- a/webif/lib/utils
+++ b/webif/lib/utils
@@ -13,8 +13,10 @@ proc lremove {var val} {
 }
 
 # Returns the epoch time for midnight today, accounting for local timezone
-proc midnight {} {
-	#return $([clock seconds] / 86400 * 86400)
-	set day [clock scan "00:00:00" -format "%T"]
+proc midnight {} {{today ""}} {
+	if {$today eq ""} {
+		set today [clock format [clock seconds] -format "%Y %m %d"]
+	}
+	return [clock scan "$today 00:00:00" -format "%Y %m %d %T"]
 }