Cron job every 30 minutes
*/30 * * * * Every 30 minutes
Typical use: sending digest notifications and sitemap pings. Try it below — change any field and see the next runs in your timezone.
Every 30 minutes
Valid
- 1Sun, Sep 27, 2026, 4:00 PM
- 2Sun, Sep 27, 2026, 4:30 PM
- 3Sun, Sep 27, 2026, 5:00 PM
- 4Sun, Sep 27, 2026, 5:30 PM
- 5Sun, Sep 27, 2026, 6:00 PM
- 6Sun, Sep 27, 2026, 6:30 PM
- 7Sun, Sep 27, 2026, 7:00 PM
- 8Sun, Sep 27, 2026, 7:30 PM
- 9Sun, Sep 27, 2026, 8:00 PM
- 10Sun, Sep 27, 2026, 8:30 PM
Field by field
| Field | Value | Meaning |
|---|---|---|
| Minute | */30 | every 30 minutes |
| Hour | * | every hour |
| Day of month | * | every day |
| 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.
*/30 * * * * /path/to/script.sh >> /var/log/job.log 2>&1spec:
schedule: "*/30 * * * *"GitHub ActionsRuns in UTC.
on:
schedule:
- cron: '*/30 * * * *'AWS EventBridgeEventBridge weekdays are 1–7 (1 = Sunday) and one day field must be ?.
cron(0/30 * * * ? *)
# or, simpler:
rate(30 minutes)Quartz (Java)Seconds first; weekdays 1–7 with 1 = Sunday.
0 */30 * * * ?Spring @ScheduledSpring adds a seconds field but keeps Unix weekday numbers.
@Scheduled(cron = "0 */30 * * * *")[TimerTrigger("0 */30 * * * *")]Running a job every 30 minutes
What is the cron expression for every 30 minutes?
*/30 * * * *. In plain English: every 30 minutes. It works in standard 5-field cron — Linux crontab, Kubernetes and GitHub Actions.How do I schedule a job every 30 minutes in AWS EventBridge?
Use
cron(0/30 * * * ? *) or the simpler rate(30 minutes). 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 "*/30 * * * *" 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.