Wouldn't work for double-digit numbers

This one is really good !

This is the test your code fails:

test.assert_equals(check_coupon('a12v564', 'a12v564', 'March 5, 1998', 'March 25, 1998'), True)

Please, fix your code. Storing the day in a single digit/char is wrong.

And what if it does? The date is 5 so it is one digit.

I doubt that, your day_expiration contains only a single digit.

The same test returns True on my ide and when i put the same code here it returns False. I printed evething I could and it seems like it should work in here too.

You should debug your own code, but it's a problem with how you parse your expiration date. Add some prints, see why it fails.

yea, why is failing?

Your code is failing the previous test, the log appears above the test result. Not a kata issue.

Mersi frumos fratelo! ;*

bine, frate