Every 3 Hours Cron Expression
0 */3 * * *Try it live
Valid
MINMinute
0HRHour
9DOMDay of Month
*MONMonth
*DOWDay of Week
1-5In plain English
At 09:00 AM, Monday through Friday
English → Cron
Try: "every 5 minutes", "every weekday at 9am", "every Monday at 3pm", "every month on the 1st"
Next 10 Executions
UTC- 1Tue, Jul 7, 09:00 AM UTCin 15h
- 2Wed, Jul 8, 09:00 AM UTCin 2d
- 3Thu, Jul 9, 09:00 AM UTCin 3d
- 4Fri, Jul 10, 09:00 AM UTCin 4d
- 5Mon, Jul 13, 09:00 AM UTCin 7d
- 6Tue, Jul 14, 09:00 AM UTCin 8d
- 7Wed, Jul 15, 09:00 AM UTCin 9d
- 8Thu, Jul 16, 09:00 AM UTCin 10d
- 9Fri, Jul 17, 09:00 AM UTCin 11d
- 10Mon, Jul 20, 09:00 AM UTCin 14d
crontab entrybash
# Add to crontab with: crontab -e
0 9 * * 1-5 /path/to/your/script.shWhen to use this schedule
- ▸ Full-table analytics refreshes on data warehouses that take 10-20 minutes
- ▸ Sending batched notification digests at morning, midday, and evening
- ▸ Archiving completed records from a hot table to cold storage every 3 hours
Platform Syntax Comparison
The same "Every 3 Hours" schedule expressed in every major platform's cron syntax.
| Platform | Expression |
|---|---|
| Standard Linux/Unix | 0 */3 * * * |
| GitHub Actions | 0 */3 * * * |
| Google Cloud Scheduler | 0 */3 * * * |
| Kubernetes CronJob | 0 */3 * * * |
| Azure Functions (NCRONTAB) | 0 0 */3 * * * |
| AWS EventBridge | 0 0/3 * * ? * |
| Quartz Scheduler | 0 0 */3 * * ? |
| Spring @Scheduled | 0 0 */3 * * * |
| Jenkins | H H/3 * * * |
| Apache Airflow | 0 */3 * * * |
Frequently Asked Questions
What are the exact run times for every-3-hours? ▾
Midnight, 3am, 6am, 9am, noon, 3pm, 6pm, and 9pm — 8 times per day.
Built & maintained by Danny Vargas
Last updated January 2026·Parsing runs in your browser — no expression leaves your device