diff --git a/systems/x86_64-linux/marvin/services/gdq-cals.nix b/systems/x86_64-linux/marvin/services/gdq-cals.nix
index 9c8188ad..817be9f3 100644
--- a/systems/x86_64-linux/marvin/services/gdq-cals.nix
+++ b/systems/x86_64-linux/marvin/services/gdq-cals.nix
@@ -30,7 +30,7 @@ in
     timers.gdq-calendars = {
       wantedBy = [ "timers.target" ];
       timerConfig = {
-        OnCalendar = "*-*-* */2:00:00";
+        OnCalendar = "*-*-* 00/2:00:00";
         Unit = "gdq-calendars.service";
       };
     };