This is your chance to be better that the rest.
Have a good look at any half past clock face in the set, and compare to the clock on your wall.
Also see:
https://symbl.cc/en/1F55E-three-thirty-emoji/
to see how few emoji sets are doing it right, and
https://medium.com/@jnebos/how-hard-is-it-to-draw-a-clock-e35ccecb4e23
to see my frustration.
If your emoji will be updated, I'll update the article and recommend openmoji to all my friends.