Leap year issue/bug

Posted this in wrong topic before … Sorry… here we go:

Here is the problem:
It seems that there is an issue with the leap year either in the time machine or with the app itself. I am trying to get to display the current day with the prior day to the left and the next day to the right. it should state for February 29th 2020 as follows:

28 - 29 - 01

Unfortunately DdL and Dd don’t work for 2/29/2020. it always comes back with 01 or 1. I cannot test 2/29 …
What am I doing wrong???
Do I make sense?