moment.js 24h format

Stating your time as HH will give you 24h format, and hh will give 12h format.

You can also find it here in the documentation :

    H, HH       24 hour time
    h, or hh    12 hour time (use in conjunction with a or A)

Try: moment({ // Options here }).format('HHmm'). That should give you the time in a 24 hour format.