Cron Expression Explainer: Read Any Schedule in Plain English
A cron line fits on one line and hides a whole calendar inside it. This explainer unpacks it field by field.
What is the Cron Expression Explainer?
Cron expressions are compact but cryptic, and one wrong field can move a job by hours or days. This explainer breaks a standard five-field expression into its minute, hour, day-of-month, month, and day-of-week parts and describes the resulting schedule in ordinary words. It is a reading aid for schedules you already have, not a builder for new ones.
How to use it
- Paste a five-field cron expression.
- Keep the field order: minute, hour, day of month, month, day of week.
- Click Explain Schedule.
- Read the plain-English sentence to check the timing before you save it.
Worked example
Explaining 0 9 * * 1-5 gives a schedule of weekdays at 09:00.
What does 0 9 * * 1-5 mean?
It means 09:00 on weekdays, Monday to Friday. The first field is the minute, the second is the hour, and the last field limits the run to days one through five of the week.
Frequently asked questions
What format does it accept?
The classic five-field form used by most schedulers, with numbers, ranges, lists, and asterisks.
Does it handle seconds or names like JAN?
No. Six-field forms and month or weekday names are outside this explainer, so use numbers for those fields.