james_davis_nicoll (
james_davis_nicoll) wrote2025-06-18 10:16 am
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Counting the Days: Five SFF Approaches to Calendars

So many different ways of measuring history and the passage of time...
Counting the Days: Five SFF Approaches to Calendars
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431 articles to go to article 1000
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More than a few years old, but both the Mayan Long Count and the Hebrew calendar start from alleged dates of the creation of the entire world. I wouldn't be surprised if there are other calendars that do as well.
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The Byzantine calendar, for instance. https://en.m.wikipedia.org/wiki/Byzantine_calendar
I quite like the idea of the holocene / human era calendar, which for simplicity just adds 10000 years to the christian count. Not quite in exact agreement with the archaeologists or the dating of beer, but not far off. And I think a little more elegant than the Long Now Foundation’s 02025 prefix zero five digit years. https://en.m.wikipedia.org/wiki/Holocene_calendar
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In The Left Hand of Darkness, we are told that on Gethen (or maybe just one of the countries), it is always Year One -- when a year ends, it becomes the first year of the past and the new year is One. This strikes me as a possible source of confusion for historians, but Gethenians don't seem to be all that much into their own history anyway, except as legend and myth.
There are examples scattered through Golden and SF of that tradition, in which a new calendar era is created to start in 1945 (the Atomic Age) or 1957, 1961, or 1969 (the Space Age).
And can any such discussion be complete without Star Dates?
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I wish I had the time [1] to jump down the Faction Paradox wormhole. It looks interesting, and the revival series no longer is to me (and finally did something so cruel and gratuitous that I have no intention of ever watching again).
[1] I own my puns. [2]
[2] And a Jolly Roger.
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"What if Gallifreyan technology but in the hands of tech nerds, theater kids, and assorted kooks?"
So yeah, this is the kind of thing that could easily eat many hours.
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I expect it's larger on the inside.
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Traveller's Third Imperium starts its calendar from its establishment, which is sensible, and has that take place in year 0 to the thanks of historians everywhere. It has no formal month/week structure, just numbering days from 1 to 365 (no leap years because this is in space and anyway Sylea's year is not the same length as Terra's). But stupidly, stupidly, stupidly, GDW had the date format be DDD-YYYY rather than YYYY-DDD, meaning dates don't sort.
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The calendar of the Theocracy of Muntab counts down. Nobody wants to find out what happens when it reaches 0