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I have searched a lot for a solution on the EventBridge for Amazon so I can use a cron which trigger a lambda function on the last day of the month in working days MON-FRI.

I cannot accomplish the working days part but here it is the last day cron.

30 13 L * ? *

This code will be triggered on the last day of the month. The ? is for every day but in fact I want 0-4 or MON-FRI.

If I enter it in the amazon cron tab it make an error for invalid cron expression.

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George Plamenov Georgiev
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1 Answers1

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You can use this cron expression : 30 13 LW * ? *

Cron expression

Here the L wildcard in the Day-of-month fields specifies the last day of the month. And the W wildcard in the Day-of-month field specifies a weekday. So in the Day-of-month field, LW specifies the last weekday closest to the month.

Ref: Schedule Expressions for Rules

Arpit Jain
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