Cron expression for every 30 minutes

About */30 * * * *

*/30 * * * * runs a job every 30 minutes, on the minute. Because 30 divides 60 evenly, the spacing stays consistent across every hour boundary.

Cron reads the five fields as minute hour day month weekday. For this schedule that breaks down as:

New to cron? Read the syntax reference or the FAQ.

Use it in crontab or GitHub Actions

Both snippets are ready to paste. A crontab runs in the server's local timezone; GitHub Actions always evaluates schedules in UTC. For Kubernetes, AWS EventBridge, or Vercel, use the export menu in the calculator above.

crontab

# Every 30 minutes, every hour, every day
*/30 * * * * /path/to/command

GitHub Actions workflow

# Every 30 minutes, every hour, every day
# Note: GitHub Actions always runs schedules in UTC.
on:
  schedule:
    - cron: '*/30 * * * *'

Repeating intervals

• every minute* * * * *
• every 2 minutes*/2 * * * *
• every 3 minutes*/3 * * * *
• every 5 minutes*/5 * * * *
• every 7 minutes≈ */7 * * * *
• every 10 minutes*/10 * * * *

Build a custom cron expression →