[ghjfrdghibt]

Personally I'd go with 13 months of 4 weeks each.

The only issue I see would be if you were born on a Monday your birthday would always be on a Monday.

[zeroonetwothree]

Do you have an extra bonus day at the end that doesn’t belong to any week?

[bee_rider]

Make that the transition day.

[bawolff]

And leap years get more complicated.

[ghjfrdghibt]

It's just another day isn't it?