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Standard POSIX / Crontab Syntax

*/30 * * * *

“Every 30 Minutes (*/30 * * * *)” — Executes every half hour (at minute 0 and minute 30). (Her 30 Dakikada Bir (Yarım Saatte Bir))

Live Interactive Crontab Translator & Evaluator

Cron Expression Translator & Next Run Schedule

Dedicated Guide
Minute
0-59
Hour
0-23
Day (Month)
1-31
Month
1-12
Day (Week)
0-6 (Sun-Sat)
Human Readable Meaning:
Executes every half hour (at minute 0 and minute 30).
Yarım saatte bir (saat başı ve buçukta) çalışır.
Quick Presets:
Next 5 Scheduled Executions
1.Sun, Sep 20, 00:00
2.Sun, Sep 20, 00:30
3.Sun, Sep 20, 01:00
4.Sun, Sep 20, 01:30
5.Sun, Sep 20, 02:00
Ready Crontab Line
*/30 * * * * /usr/bin/python3 /opt/scripts/backup.py
Crontab 5-Field Breakdown
*/30
Minute
Every 30th minute (*/30)
*
Hour
Every hour (*)
*
Day (Month)
Every day (*)
*
Month
Every month (*)
*
Day (Week)
Every day of week (*)
Copy-Paste Integration Snippets
Linux (crontab -e)
*/30 * * * * /usr/bin/python3 /opt/scripts/backup.py >> /var/log/cron.log 2>&1
GitHub Actions Workflow
on:
  schedule:
    - cron: '*/30 * * * *'
Kubernetes (CronJob Spec)
apiVersion: batch/v1
kind: CronJob
metadata:
  name: scheduled-task
spec:
  schedule: "*/30 * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: runner
            image: alpine
          restartPolicy: OnFailure
Other Popular Cron Schedules
* * * * *(Her Dakika Başı)
*/2 * * * *(Her 2 Dakikada Bir)
*/3 * * * *(Her 3 Dakikada Bir)
*/5 * * * *(Her 5 Dakikada Bir)
*/10 * * * *(Her 10 Dakikada Bir)
*/15 * * * *(Her 15 Dakikada Bir (Çeyrek Saatte Bir))
*/20 * * * *(Her 20 Dakikada Bir)
*/45 * * * *(Her 45 Dakikada Bir)
0 * * * *(Her Saat Başı)
Frequently Asked Questions

Common Questions About */30 * * * * to Cron Syntax

Everything you need to know regarding specifications, syntax, and security best practices.

Executes every half hour (at minute 0 and minute 30). In Turkish: Yarım saatte bir (saat başı ve buçukta) çalışır.