Can I write a cron expression that does not specify any day or month?

Lately, I want to send automation that follow up with the customers everyday when the ticket had been inactive for 1 day or more.

I want to construct a cron expression that does not specify any Day-of-month or Day-of-week.

Cron table explanation.PNG

cron expression example.PNG

I just want to make sure can I write something like:

0 00 1 ? * ?

As from the examples listed in the documentation, it is only either Day-of-month or Day-of-week is not specify but not both at the same time.

1 answer

3 votes

Answer accepted

0 0 1 * * * Launches every day at 01:00 am regardless of the day of the week/month, if that's what you're trying to do.

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This link is awesome.

Thank you and that is what I actually want to achieve but may I know why shouldn't I use "?" to place at the both attribute?

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I'm not a CRON expert and I haven't even looked up what "?" means but I know "*" means "any" so there's no need to go further than that, I guess :)

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Oh I see. Anyways, thank you @Iago Docando .

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