I found a nice custom function in the comments of this CF  That allows a user to quickly enter times.

 

Let(
[
tt =
Int(
Substitute(
Choose( Length( textfield ) - 1; "ç00"; "ç00"; "ç"; "ç" );
"ç";
textfield
)
);
ts = Case( Div( tt - 100; 1200 ); 100 + Mod( tt - 100; 1200 ); tt )
];
Replace( ts; Length( ts ) - 1; 0; ":" ) & " " &
Case(
Position( Lower( textfield ); "p"; 1; 1 );
"P";
Div( tt - 100; 1200 );
"P";
"A"
) & "M"
)

But there are a few bugs:

00 = 12:00pm

10p and up = 12:00pm

 

Plus I would like a tweak:

let "." convert to 'pm'  (for users with extended keyboards)

 

any ideas?

I'll be looking forward to your updated calc!

spoken like a true father David.

 

Okay it could be streamlined. But I fixed the 10p–12am entries, default is PM and a '.' (period) equal AM

 

 

Let([

start = Lower ( textfield ) ;
value = Filter ( start ; "1234567890" ) ;

tt =
Int(
Substitute(
Choose( Length( value ) - 1; "ç00"; "ç00"; "ç"; "ç" );
"ç";textfield)  );

ts = Case( 
Div( tt - 100; 1200 ); 100 + Mod( tt - 100; 1200 ); tt ) ;

tc = Replace( ts; Length( ts ) - 1; 0; ":" ) ;
dv = Abs (Div( tt - 100; 1200 )-1)
];


tc & " " &
Case(
Position( start; "a"; 1; 1 ) or Position( start; "."; 1; 1 ) ; "A";
dv =1; "P";dv =2; "A"; dv =0; "A"; 
"P" ) & 
"M"

)