Does it exist a time format that doesn't require to always write the two points?

I'll be more precise.

I'm creating a new sheet for the shifts schedule at work and I'm trying to figure out a way where when I insert a number in the cell, it gives me the hour and the minutes only (ex.: 14 becomes 14:00 and 14:30 also becomes 14:30). The cell format is hh:mm but when I insert just a number without the two points, or the minutes, it automatically convert the number into a date, even if it's set as an hour. Is there a way to do this or am I doomed to write every time the exact time?