I'm not sure how what the function is called but I'm hoping it exists. Basically;

When filling out a time sheet all the shifts are one of a few, there are early's (07:30 - 15:30) Late's (15:00 - 23:00) sleeps (just paid for the staying the night, flat rate) and [rarer] Mids (11:00 - 19:00)

So instead of filling out ' 07:30' and '15:30' on a sheet it would be great if i could just put 'early' or even 'e' and excel would know that this represented the time 07:30 - 15:30 and calculations could be done of it.

Is this possible?

cheers