Cron job every 3 days
0 0 */3 * * At 12:00 AM, every 3 days in a month
Typical use: periodic cleanup of old files. Try it below — change any field and see the next runs in your timezone.
At 12:00 AM, every 3 days in a month
Valid
- 1Mon, Sep 28, 2026, 12:00 AM
- 2Thu, Oct 1, 2026, 12:00 AM
- 3Sun, Oct 4, 2026, 12:00 AM
- 4Wed, Oct 7, 2026, 12:00 AM
- 5Sat, Oct 10, 2026, 12:00 AM
- 6Tue, Oct 13, 2026, 12:00 AM
- 7Fri, Oct 16, 2026, 12:00 AM
- 8Mon, Oct 19, 2026, 12:00 AM
- 9Thu, Oct 22, 2026, 12:00 AM
- 10Sun, Oct 25, 2026, 12:00 AM
Field by field
| Field | Value | Meaning |
|---|---|---|
| Minute | 0 | minute 0 |
| Hour | 0 | hour 0 |
| Day of month | */3 | every 3 days |
| Month | * | every month |
| Day of week | * | every day |
The same schedule on every platform
The five fields mean the same thing everywhere, but each scheduler wraps them differently — and AWS and Quartz number weekdays from 1 (Sunday), not 0.
0 0 */3 * * /path/to/script.sh >> /var/log/job.log 2>&1spec:
schedule: "0 0 */3 * *"GitHub ActionsRuns in UTC.
on:
schedule:
- cron: '0 0 */3 * *'AWS EventBridgeEventBridge weekdays are 1–7 (1 = Sunday) and one day field must be ?.
cron(0 0 1/3 * ? *)Quartz (Java)Seconds first; weekdays 1–7 with 1 = Sunday.
0 0 0 */3 * ?Spring @ScheduledSpring adds a seconds field but keeps Unix weekday numbers.
@Scheduled(cron = "0 0 0 */3 * *")[TimerTrigger("0 0 0 */3 * *")]Running a job every 3 days
What is the cron expression for every 3 days?
0 0 */3 * *. In plain English: at 12:00 AM, every 3 days in a month. It works in standard 5-field cron — Linux crontab, Kubernetes and GitHub Actions.How do I schedule a job every 3 days in AWS EventBridge?
Use
cron(0 0 1/3 * ? *). EventBridge needs six fields (a year at the end), a ? in one of the day fields, and numbers weekdays 1–7 starting on Sunday.What timezone does "0 0 */3 * *" run in?
Cron uses the server's timezone. Kubernetes CronJobs default to the controller's timezone (set
spec.timeZone on 1.27+), GitHub Actions and AWS EventBridge rules always use UTC. Use the timezone picker above to see the next runs in your own time.