How to extract last 2 digits from date year in next column?

Hi friends,
I want to extract the last 2 digits of date year in next column. For ex. suppose the date is in column O then the output should be in column P.

I don’t want to change the date each year but I want to change the number in column P each year. 10 to 11, 11 to 12, 12 to 13 and so on each year.

If there is a remark in column Z ‘Left’ then no change in the number in column P.
Thanking you,