If commuting, I take public transport so charge on last bit of journey before (or after work) if needed or a heavy phone day.

At home/weekends - whenever it drops and I have time.

60 is useful because it’s easily divided by lots of small numbers, 1,2,3,4,5 and 6, other factors include 10, 12, 15, 20, 30, and 60. This is why we can split our day so much.

The Babylonians popularised base 60. The origins of which were possibly derived from 2 separate groups in Mesopotamia, that started trade but one used base 12 and one base 5, multiply together to get 60.

You can count to 5 and 12 on one hand easily (12 by using thumb to count each section of your 4 finger). Using both hands you get to 60.

https://mathsciencehistory.com/2021/11/09/count-to-60-with-your-phalanges/

China also has counting to 10 on one hand, theory being you can indicate quantities with one hand full at a market.

Civil Rights Act of 1964 prohibits different treatment of insured persons on the basis of their sex in connection with pension funds. This was a supreme court ruling, so kind of linked but not quite.

https://www.jstor.org/stable/253100

Interestingly, in UK and EU it became illegal to discriminate by sex for car insurance from about 2012, without very careful use of data - which doesn’t happen. It is allowed to be linked on things like jobs though.