Cron last day of month

Fires at 00:00 on the LAST day of every month — handles 28/29/30/31-day months automatically. Standard cron does NOT support this; you need Quartz, AWS EventBridge, or workaround logic.

advanced POSIX / Jenkins / Quartz / AWS

0 0 L * *

cron last day of month.

Next 5 fire times

Computed live in your local timezone. The cron expression itself is timezone-agnostic — these times reflect your browser clock.

computing…

Cross-system syntax variants

Same intent, different schedulers. Use this table when migrating between systems.

System	Expression	Note
Standard cron (POSIX)	(NOT SUPPORTED)	POSIX cron has no 'last day' token. Workaround: 0 0 28-31 * * combined with `[ $(date +%d) = $(date -d "+1 day" +%d) ] && exit 1` shell logic
Quartz (Java)	0 0 0 L * ?	L = last day; this is the canonical form
Quartz (with offset)	0 0 0 L-3 * ?	L-3 = 3 days before month end (handles leap years correctly)
AWS EventBridge	cron(0 0 L * ? *)	AWS supports L token natively
systemd timer	OnCalendar=-~01 00:00:00	tilde-syntax — ~01 = 1 day before next month start

Common pitfalls

WARNING: standard POSIX cron does NOT support L. The expression `0 0 L * *` will silently fail or be rejected. Verify your cron implementation.
Workaround for POSIX: `0 0 28-31 * * /usr/bin/test $(date -d "+1 day" +%d) -eq 1 && /your/script` — fires only when tomorrow is the 1st.
`L-1` means 'second-to-last day', not 'last day with 1-hour offset'. Read your scheduler's docs carefully — semantics vary.

Use cases

Month-end financial close
End-of-month inventory snapshot
Tax/accounting period boundary jobs
Subscription quota reset (28/29/30/31 aware)

Translate any cron expression

cronwtf takes any cron string and returns plain-English description plus the next 5 fire times in your timezone. Standard 5-field, Jenkins H, Quartz 6-field — all supported.

Open cronwtf

Related cron schedules

cron every 15 min during business hours · cron: every minute · cron every 3 hours · cron: every weekday (mon-fri) at 9 am