Crontab Next Run
Strictly parse five-field cron expressions and calculate the next run from an explicit UTC base time.
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Cron expression
Next run
Strict five-field UTC syntax only.
Enter an expression and base time
What this tool does
- Inspect the meaning of a five-field cron expression.
- Calculate the next run after a supplied instant.
- Validate minute, hour and calendar field ranges.
Example
Input
0 9 * * 1-5
Output
2026-10-12 09:00 UTC
Base must be YYYY-MM-DDTHH:mmZ; the next run is strictly after it. Supports five numeric fields, *, lists, ranges and steps only; UTC, without TZ/DST, aliases or seconds.
Frequently asked questions
Does it use the current time?
No, the base time is explicit.
Are time zones and DST supported?
No; all calculations use UTC.
Can the base minute itself be returned?
No, the result is strictly later than the base.
Keywords：crontabcron parsernext runUTC计划任务