Transcription
A map of the world with vertical lines marking the time zones from UTC-12 to UTC+12. It has a legend:
Wrong Time
"Natural time zones" are 15° in longitude. Land in red observes a time other than the zone it lies within. Smaller islands depict their 12 nautical mile territorial sea, for visual effect. In some cases this includes a state's archipelagic waters.
Plate Carrée projection, WGS-84 datum. December 2018 © International Mapping, all rights reserved.
Couldn't find details of what that is.
Ok this is very interesting. I like it.
But personally, I'm a bigger fan of the Calendar of Harptos from the fantasy Forgotten Realms world. Conveniently, it also has 365 days per year, except every 4 years when it's 366. 12 months of three ten-days each. It has a few more intercalary days than Cotsworth, but maintains a number of months divisible by 4 so we can continue having 3 months per season.
And speaking of seasons. In this idealised world, everywhere (or at least everywhere that uses the Spring, Summer, Autumn, Winter season cycle) should use meteorological seasons, rather than the ridiculous astrological seasons currently more popular in Europe and North America.