Thanks! It should be fixed now :)

I´ve updated the tests.

Marking this question as resolved for now :)

Marking this suggestion as resolved for now.

I updated the description, but I don't have time to update the unittests now (writing this on my lunch break). I will polish the description and add more and better unittests when I get home ;)

Scrap that! I just got the official validating rules that swedish tax agency uses :D

When the number is twelve digits, the first two digits of the year can be either 18, 19 or 20.

Or should we make it simpler? Only allow years between 1900 and 1999?

I answered in the other thread.

Thanks! I love constructive criticism, it's what makes us better. ;)

Yeah, you guys are right.

If the year has the format YY, it should be treated as 19YY.

The valid date range is between 19000101 and 29991231.
Leap years should be taken into consideration.

@kazk @ZozoFouchtra What do you think if I put this in the description and update the testcases accordingly?

Hi! Shouldn't all years between 0000 and 9999 be valid as long as it's a valid date?

Thanks! It should be fixed now ;)