diff --git a/etc/systemd/system/sh.zio.backup.timer b/etc/systemd/system/sh.zio.backup.timer
index f85052b..fd8324b 100644
--- a/etc/systemd/system/sh.zio.backup.timer
+++ b/etc/systemd/system/sh.zio.backup.timer
@@ -2,8 +2,8 @@
 Description=sh.zio.backup
 
 [Timer]
-OnCalendar=*-*-* 03:00
-RandomizedDelaySec=3h
+OnCalendar=*-*-1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31 03:00
+RandomizedDelaySec=6h
 Persistent=true
 
 [Install]