[tz] Did Greenland abolish daylight saving from 2024 on?

Paul Eggert eggert at cs.ucla.edu
Sat Nov 18 21:48:05 UTC 2023

On 2023-11-18 11:51, Robert Elz via tz wrote:
> 12n (or nn or something) and 12mn
> make much more sense than 12am and 12pm.

The traditional form is "12 m." for noon, where "m." stands for 
"meridies", i.e., neither ante nor post meridian. This abbreviation is 
mentioned in (among other places) the Chicago Manual of Style, which 
goes on to say "very few use that form. And the term 12:00 p.m. is 
ambiguous, if not illogical." See:


Computer nerds' strong preference for origin-zero counting have caused 
computer-based clocks to use 12 a.m. for midnight and 12 p.m. for noon, 
despite the latter being arguably "illogical".

A bit of trivia: in Latin "meridies" also means "south" or "southward", 
because if you stood in ancient Rome at noon, the sun was in the south. 
This worked because Rome used local solar time, not mean solar time.

Contrast ancient Room to today's Nuuk, Greenland where Stellarium says 
the Sun's azimuth at local noon today was about 163° and in the summer 
the Sun's noon azimuth can get down to around 130° - a long, long way 
from the 180° of true south. In this sense, ancient Roman timekeeping 
was a whole lot better than ours.

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