Cron Expression: */30 * * * *

Every 30 minutes (00 and 30) of every hour.

Field Breakdown

FieldValue
Minute*/30
Hour*
Day of Month*
Month*
Day of Week*

Common Use Case

Aggregation jobs, periodic notifications.

Sample Fire Times (UTC)

WhenUnix Timestamp
2026-04-27 22:001777327200
2026-04-27 22:301777329000
2026-04-27 23:001777330800
2026-04-27 23:301777332600
2026-04-28 00:001777334400

Sample times computed at build; your scheduler will fire on its own clock.

Equivalents in Popular Schedulers

crontab (Linux/macOS)

*/30 * * * * /path/to/your/script.sh

GitHub Actions (.github/workflows/*.yml)

on:
  schedule:
    - cron: '*/30 * * * *'

AWS EventBridge (cron format)

cron(*/30 * * * *)    # Note: AWS uses 6 fields with year

Kubernetes CronJob

spec:
  schedule: "*/30 * * * *"

Other Common Cron Expressions

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