Can it do this?

I work a job in which I do certain tasks and the time when I completed them must be recorded. Is there a way I can make this watch do that? If there is, for the life of me, I haven't been able to find it. I don't need GPS coordinates, speed, maps, waypoints... none of that. I just need to be able to do a task, press a button or something on the watch and have it record a timestamp, the current time. That's it. Then at the end of the day I can look at a list of the timestamps and write it all down.

Is this possible? Like a custom activity I can create or some app or feature I'm missing?