[qwertox]

This past 22nd of July was the shortest recorded day [0]. How would your library handle this?

[0] https://www.space.com/astronomy/earth/earth-will-spin-faster...

[gmueckl]

Answer: not at all, unless I had to deal with astronomical time to compute locations of celestial bodies with high precision.

[cortesoft]

No libraries handle this, though