I'm trying to customize the standard HTML5 time input field to fit my purposes. I'm working on a mobile web app where I'm asking the user to enter a time for the duration of an event (mm:ss). The almost gives me what I want, but I need to remove the AM/PM picker.

Does anyone know of a way to get rid of AM/PM? Alternatively, is there a way to modify the <input type="number" /> to accept the : character and also fit this purpose?
