Cron Expression Parser

* * * * *

Every minute

0 * * * *

Every hour

0 9 * * 1-5

Weekdays at 9am

0 0 * * 0

Every Sunday midnight

0 0 1 * *

First day of month

*/15 * * * *

Every 15 minutes

0 0 * * 1

Every Monday midnight

30 4 1,15 * 5

Complex schedule