CloudWatch Events: Schedule Expression Invalid

Question

I have written a cron expression below:

0 13 * * 1-5

for triggering “At 13:00 on every day-of-week from Monday through Friday.”

But when I use it in cloudwatch events I replaced the day of the month with ? as stated in the aws docs. But this doesn't work and says Parameter ScheduleExpression is not valid

Minute Hour day(of the month)  month day(of the week)
0       13       ?               *       1-5

What am I missing here?

Thankyou!

Answer 1

As stated here.

Cron expressions have six required fields.

It worked after adding an extra * for the year field.

Also normal cron syntax uses 0-6 for sunday-saturday but for clouwatch events 1-7 is used for sunday-saturday.

AWS documentation