Cron Schedule Overlap Checker

Compare two five-field cron expressions inside a bounded time window and list matching collisions.

Schedule A

Schedule B

Start UTC

End UTC

ReadyLists minute-level UTC collisions in the selected bounded window; at most 500 are displayed.

Build → explain → project → verify

Treat cron as a deployment configuration: confirm dialect, field count, timezone, day-of-month/day-of-week behavior and several future runs before shipping.