Well you either use a for lowercase or A for uppercase.
You are clearly using it correctly, you even show how it looks on your webpage as using it so I’m at a loss as to how you say its not showing up?
Also what does this have to do with your database? - You state you’ve got a date/time stamp there but you don’t explain how its related to the date and time display on your webpage.
Also can you please show us your actual code? - wrapped in php tags too.