

Six days week calendar with 12 months of 5 weeks = 360 days. Pad 5 or 6 months with an additional day at the end of the month that is not part of a week to complete the year.
It is much more regular, weeks won’t move and on leap year it is perfectly symmetrical
6 days a week is also better because it is not a prime number, it is divisible.
Doing a task every 2 or 3 days is much easier to schedule.




Airplane got a huge correction because emissions at high altitude is worse for the climate.
This part is a fairly new consensus, at some point air travel was even maybe beneficial for the climate due to formation of cloud cover.
Energy efficiency is not equivalent to CO2 emissions.