Ingame Clock UI/widget

First time modder, I’ve always wondered why Wildcard never added a clock system to the UI (something like WoW) has. I know Shift-tab to get into steam shows you the time. But I’m thinking of a clock + alarm so when you are out and about while waiting on your dinos to gestate you don’t forget about it (like I do). Any modder Vets thought about this? if so how difficult do you think it would be to create.