I had a problem when embedding the Date code by ending with M behind the date, please help. An error 

I didn't know that writing M was for subscription, actually I just wanted to write AD after the year which I abbreviated as M

I intend to write like this 22-09-2024 M

I didn't know that writing M was for subscription, actually I just wanted to write AD (MASEHI) after the year which I abbreviated as M

I intend to write like this 22-09-2024 M (Masehi)