Cron expression
* 4 12 MAR *
This cron expression schedules a command to run every minute, between 04:00 and 04:59, on day 12 of the month, only in March.
Read more in the dedicated guide: Cron every minute.
April 2026
Showing next 1000 cron schedules (Keep in mind some crons might be 'cut off' sooner than others depending on their frequency)
What this cron means, field by field
Each field of * 4 12 MAR * controls one dimension of the schedule. Hover over any value in the editor above to see its tooltip; the table below summarises the same information.
| Field | Value | Means | Range / hint |
|---|---|---|---|
| minute | * | every value (wildcard) | 0-59. The minute(s) of the hour the job will fire. |
| hour | 4 | at hour 4 | 0-23. The hour(s) of the day the job will fire (0 = midnight, 23 = 11 PM). |
| day of month | 12 | at day of month 12 | 1-31. The day(s) of the month. Use * if you want every day. |
| month | MAR | at month MAR | 1-12 or JAN-DEC. The month(s). Use * for every month. |
| day of week | * | every value (wildcard) | 0-7 or SUN-SAT (0 and 7 both mean Sunday). Use * for every weekday. |
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Similar cron expressions
Common variations and tweaks of * 4 12 MAR *.
*/5 4 12 MAR *Every 5 minutes, between 04:00 and 04:59, on day 12 of the month, only in March*/15 4 12 MAR *Every 15 minutes, between 04:00 and 04:59, on day 12 of the month, only in March*/30 4 12 MAR *Every 30 minutes, between 04:00 and 04:59, on day 12 of the month, only in March* 4 12 MAR 1-5Every minute, between 04:00 and 04:59, on day 12 of the month, Monday through Friday, only in March
Examples
- 018***Every day at 18:00
- 0*/5***Every 5 hours
- 018**1-5Weekdays at 18:00
- 001**Once a month
Cheatsheet
Where else this cron could be used
The same expression * 4 12 MAR * works in:
- Standard Unix
crontab(5-field syntax). - AWS EventBridge / Lambda Scheduled (with a 6th field for year, often
*). - Vercel cron jobs (declared in
vercel.json). - Quartz Scheduler and node-cron, robfig/cron and similar libraries.
Run this cron in production
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Schedule
“every minute, between 04:00 and 04:59, on day 12 of the month, only in March”
Next run
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