Question 1

What does the cron expression `* 2 28 SEP 1-5` mean?

Accepted Answer

every minute, between 02:00 and 02:59, on day 28 of the month, Monday through Friday, only in September.

Question 2

When does `* 2 28 SEP 1-5` run next?

Accepted Answer

The next runs (UTC): 2027-09-01 02:00; 2027-09-01 02:01; 2027-09-01 02:02; 2027-09-01 02:03; 2027-09-01 02:04.

Question 3

Is `* 2 28 SEP 1-5` a valid cron expression?

Accepted Answer

Yes - CronTool's parser accepts this expression and the calendar projects future runs successfully.