Cron expression
*/5 21 1 * *
This cron expression schedules a command to run every 5 minutes, between 21:00 and 21:59, on day 1 of the month.
Read more in the dedicated guide: Cron every 5 minutes.
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 */5 21 1 * * 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 | */5 | every 5 minutes | 0-59. The minute(s) of the hour the job will fire. |
| hour | 21 | at hour 21 | 0-23. The hour(s) of the day the job will fire (0 = midnight, 23 = 11 PM). |
| day of month | 1 | at day of month 1 | 1-31. The day(s) of the month. Use * if you want every day. |
| month | * | every value (wildcard) | 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. |
Next 5 runs
Computed in UTC. The calendar above shows the same runs in your local timezone.
- #1
- #2
- #3
- #4
- #5
Similar cron expressions
Common variations and tweaks of */5 21 1 * *.
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 */5 21 1 * * 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
Stop pasting `*/5 * * * *` into a host you also have to babysit.
WordPress, Shopify, Railway, Cloud Run, Vercel, HubSpot, Ghost, your own box. If it answers HTTP, Crontap can drive it on a clock you can read, in the timezone that actually matters, and page you when something breaks.
Free forever tier ・ No credit card required
Schedule
“every 5 minutes, between 21:00 and 21:59, on day 1 of the month”
Next run
in 23s