Five-field POSIX cron

Cron parser with explicit day semantics

Check one narrow cron expression and enumerate future examples without hidden extensions.

Cron expression

Minute · hour · day of month · month · day of week

● Stays in this browser
Exactly five whitespace-separated numeric fields

Accepted tokens are *, a number, an ascending range or comma-separated combinations. Steps, names and vendor extensions are rejected.

This is not a scheduler or operations monitor. Verify the exact expression and timezone in the system that will run it.