Question 1

What is a cron expression?

Accepted Answer

Cron expressions are compact strings like '0 9 * * 1-5' that define when a scheduled job runs. Each field represents minute, hour, day, month, and weekday.

Question 2

How do I schedule a job to run every 15 minutes?

Accepted Answer

Use '*/15 * * * *'. The */ syntax means 'every N steps'.

Question 3

Does this support seconds?

Accepted Answer

Standard Unix cron uses 5 fields (no seconds). The tool also supports 6-field Quartz/Spring format with seconds as the first field — toggle the switch.

Question 4

Why does the next-run time look wrong?

Accepted Answer

Next-run times are computed in your local timezone. If your server runs in UTC, the displayed times will be offset.

Cron Expression Builder

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