Question 1

What is a cron expression?

Accepted Answer

A cron expression is a string of 5 fields that defines a schedule for a recurring task. Fields are: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-7, where 0 and 7 are Sunday).

Question 2

What does * mean in a cron expression?

Accepted Answer

An asterisk (*) means "every" for that field. "* * * * *" runs every minute. "0 * * * *" runs at minute 0 of every hour.

Question 3

What does */15 mean?

Accepted Answer

"*/15" means "every 15 units". In the minute field it means "every 15 minutes". In the hour field it means "every 15 hours".

Question 4

Can I use ranges and lists?

Accepted Answer

Yes. Use a hyphen for ranges (1-5 = Monday to Friday), a comma for lists (1,3,5 = Mon, Wed, Fri), and a slash for steps (*/2 = every 2 units).

Cron Expression Generator

Field Breakdown

Common Schedules

Frequently Asked Questions

Cron Expression Generator

Field Breakdown

Common Schedules

Frequently Asked Questions

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