I just screamed this at someone (over IM, not really screaming) that estimates in scrum are meant to measure complexity and not time to completion. There are still people in 2019 saying things like "1 point is 1 day of work" and I want to murder them. The whole point of scrum is that time estimation is futile.

Estimate complexity and then measure your velocity as tasks get completed and you can make a rough forecast of future velocity.