Cron Explainer: 5-Field Scheduling Guide
Nightly 02:30 backups need readable cron lines. This tool translates 5-field expressions into plain language with the next 5 run times in your device timezone. Stars, ranges and lists are explained individually. Verify server time for production.
Step by step
- Type a 5-field expression, e.g. */15 9-17 * * 1-5.
- Read the plain explanation.
- Review the next 5 times in your timezone.
- Reconcile with server time.
- Copy the verified line to the scheduler.
Example scenario
A team wanting reports every 15 minutes on weekdays writes */15 9-17 * * 1-5. Explanation and upcoming times list out. Matching server time, it goes to the scheduler.
Check your result
Confirm 5 fields with in-range values. Check upcoming times meet expectations. Second-based systems need other syntax.
Frequently asked questions
What are the fields?
Minute, hour, day, month, weekday in order.
What does */15 mean?
Every 15 minutes.
What is 1-5?
Monday to Friday.
Which timezone?
Device time is used.
Cron with seconds?
No, 5-field structure only.
Open the tool: Cron Explainer →
Keep an original copy before processing your file. Examples are illustrative; results depend on your document.