this post was submitted on 15 Nov 2025
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An alternate calendar system briefly used by republican France. It had 360 days per year with 5 or 6 "intercalary" or leap days between years. It had 12 months of 30 days, which were comprised by 3 weeks of 10 days. Every day of the year had a unique name: a common plant, animal, mineral, or tool/equipment (ie January 31 was "Broccoli" and May 4 was "Silkworm").

YSK because it's an interesting alternative to the Gregorian calendar and the occasionally-proposed 13 month calendar.

Though it did have some problems such as starting in late September (very unusual for a calendar) and not having a robust leap-year system.

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[–] Pyr_Pressure@lemmy.ca 4 points 2 days ago

I wouldn't mind a 10 day week if it meant work 6 and then get a 4 day weekend.

But who am I kidding our corporate overlords would expect at least 8 on and 2 off

[–] altphoto@lemmy.today 4 points 2 days ago

10 day week...screw that! How about Saturday, Sunday, Monday... And it repeats! Saturday, Sunday, Monday! You work 8 hours on Monday. You rest Saturday and Sunday.

[–] quick_snail@feddit.nl 17 points 3 days ago* (last edited 3 days ago) (1 children)

The Common Era, commemorating the birth of Jesus Christ, was abolished and replaced with l'ère républicaine, the Republican Era, signifying the "age of reason" overcoming superstition, as part of the campaign of dechristianisation.

So cool.

Shame they then gave up reason and gave power to a self proclaimed emperor who went on murderous rampage across Europe.

I'll never understand how the beautiful Paris Commune led next to fucking Napoleon

[–] ZombiFrancis@sh.itjust.works 4 points 3 days ago

Disenfranchised ruling class commits to counter-revolution. Repeat.

But for that specifically, it is conveniently called the Thermidorian Reaction, using this calendar's terminology.

[–] Pyr_Pressure@lemmy.ca 3 points 2 days ago

I would like this calender but we would need to adjust it so that new years falls on the winter solstice.

Plus the 5 leap days would need to be a global celebration / holiday period, and the 6th day every 4 years a massive holiday.

[–] Nemo@slrpnk.net 38 points 4 days ago (5 children)

They also had metric clocks.

But in any case, I'm more intrigued by the idea of the calendar with thirteen 28-day months. Too many religions are invested in the question of what day of the week it is to move away from a seven-day week.

[–] captainlezbian@lemmy.world 2 points 3 days ago* (last edited 3 days ago)

Alternatively 8 months of 5 weeks of 9 days with 5 days spread between them. 3 days off each week. Each month begins on a solstice, equinox, or halfway between them.

We can go as crazy as we'd like

[–] JubilantJaguar@lemmy.world 6 points 4 days ago (3 children)

13! A prime number indivisible into anything. Ugh!

[–] Makeitstop@lemmy.world 21 points 4 days ago

I've seen people object to a 13 month calendar based solely on the idea that you can't divide the year into quarters. But it's actually really easy to remember. A quarter is 13 weeks, or 3 months and 1 week. So Q1 ends a week after month three, Q2 ends 2 weeks after month six, Q3 ends 3 weeks after month nine, and q4 ends after month 13 aka the end of the year. And since the calendar doesn't change, you don't even need to remember it, just mark the quarter ends once and you're done forever.

Just compare that to the unnecessary complexity of the Gregorian calendar and the effort it takes to remember basically anything that changes from year to year, or what day of the week any given date or holiday falls on, or even just which months have 30 days and which have 31.

[–] elephantium@lemmy.world 7 points 3 days ago

13! is definitely not a prime number, but it's too large to be useful in this context (I know, I know, you didn't actually MEAN 13-factorial, but I've studied enough maths that I couldn't help it).

[–] Nemo@slrpnk.net 6 points 4 days ago

Fine! Four months of thirteen weeks, and no more complaining!

[–] BastingChemina@slrpnk.net 3 points 3 days ago

Yes, they also decided to change the time to decimal time.

The day was divided into 10 hours, each hour was 100 minutes ...

[–] Pyr_Pressure@lemmy.ca 0 points 2 days ago

Eh fuck religions, they can keep their old antiquated calenders.

[–] gedaliyah@lemmy.world 25 points 4 days ago
[–] HubertManne@piefed.social 16 points 4 days ago (2 children)

Holy crap this is what I wanted. at least four of the intercalary days should be the solstice and equinoxes. and I wanted the weeks to be 5 weeks of 6 days per month with every month starting and ending on the same day. I would be tempted for the fifth and sixth intercalary to be after the winder solstice and call the fifth new years and the sixth one leap day or something. I figure thats sorta the main holiday time anyway.

[–] becausechemistry@lemy.lol 5 points 4 days ago (2 children)

In the revolutionary context, the extra days were all piled into the end of the year. Kind of a special short month, or more realistically a set of days not in a month. But yeah, leap days were added there when necessary.

Twelve months of five weeks of six days plus five or six days at the end for Christmas and New Years would absolutely rule. As long as weeks became 4+2 and not 5+1, anyway. I say we drop Thursdays and just keep the rest of the day names, they’re fine.

[–] elephantium@lemmy.world 4 points 3 days ago

Best we can do is 996 with the new 6-day weeks.

[–] XeroxCool@lemmy.world 1 points 3 days ago

I like T/W/F more than T/Th/F but I still rather Thursday over Wendedsday

[–] isyasad@lemmy.world 1 points 3 days ago (1 children)

I really like the idea of 10 days because of where weeks come from. In many languages, the names of days trace back to major celestial bodies (Sun, Moon, and the five planets). This is very obvious in English with Sunday (Sun), Monday (Moon), and Saturday (Saturn) but less obvious with other days because the names were converted into Germanic gods (Thursday = Thor's day, though the planet should be Jupiter).

Well now that we know there's two more planets: Uranus and Neptune, and the Earth is also a planet... it would kinda make sense to add 3 more days to the week for Uranus, Neptune, and Earth.

The actual French republican calendar just uses numbered days ie primidi, duodi, tridi similar to Chinese and Portuguese but imo that's so boring.

[–] HubertManne@piefed.social 1 points 3 days ago (1 children)
[–] isyasad@lemmy.world 1 points 3 days ago (1 children)

Yeah unless it comes with 5-day weekends 😢

[–] Pyr_Pressure@lemmy.ca 2 points 2 days ago (1 children)

I wouldn't mind 6 days on 4 days off

[–] isyasad@lemmy.world 1 points 2 days ago (1 children)

6/4 sounds great. I think 3/2/3/2 is also an option, or if there's one more work day, maybe 3/1/4/2. If only five days of work, we could try the most radical 1/1/1/1/1/1/1/1/1/1 (work every other day). 5/5 is actually pretty reasonable and maybe my favorite. It's actually pretty workable for employers too because if you need someone working every day, it's simple to just hire two people. Makes it easier for everybody, and doesn't it sound great to have three 5 day breaks every month?

I think the biggest advantage to a 10 day week is really just that it accommodates more variation in schedule, and not every person or every industry has to have the same work week. It certainly helps being an even number, so scheduling anything for every other day is easier.

I'm actually so down for calendar reform but it seems like it's probably an impossible task.

[–] Pyr_Pressure@lemmy.ca 2 points 2 days ago

Yes I would also love a new calendar. But we can hardly come to consensus on getting rid of daylight savings time let alone a new calendar lol.

[–] fonix232@fedia.io 17 points 4 days ago (2 children)

12 months of 30 days

January 31

You can only pick one of these.

[–] isyasad@lemmy.world 5 points 3 days ago

They did not have a 31st day and neither did they have a January. Rather, the day that we call January 31 was the 12th day of Pluviôse and also had its own name "Broccoli"

[–] HenriVolney@sh.itjust.works 7 points 3 days ago (2 children)

Starting the year in January sucks. Ancient civilizations had it right with a start of the year at the Spring equinox. The original design by Sylvain Marechal, right before the Revolution started, did start in March...

[–] Pyr_Pressure@lemmy.ca 1 points 2 days ago (1 children)

I don't see why it sucks, it just makes sense to start it on the winter solstice as the days start to get longer and longer / shorter and shorter depending on the hemisphere you are in

[–] HenriVolney@sh.itjust.works 1 points 2 days ago

Starting a new year in the dead middle of Winter doesn't make sense to me. Spring is when trees and flowers start blooming, hence the choice of March for the first month by Antique civilizations (also the start of their military campaigns which, although convenient, is not something I get behind really)

[–] fonix232@fedia.io 0 points 3 days ago

That's completely irrelevant to my point, which was that in a calendar of 12 30-day months you can't have a 31st day of any month.

[–] JubilantJaguar@lemmy.world 16 points 4 days ago* (last edited 4 days ago) (1 children)

As I recall, a major reason it didn't take off was very simple: the new "Sunday" only came every 10 days instead of 7!

The best bit about it was definitely the evocative month names.

[–] gedaliyah@lemmy.world 6 points 4 days ago

Thermidor > July ×10

I think it would be fair to highlight that this was revolutionary France' brainchild. It is a republic today as well but they've gone back and forth on that one a bit in the last two centuries.

[–] Valmond@lemmy.world 4 points 4 days ago

School year starts around September so that's kind of nice but what did it in, or so I have heard, was the 10 day workweek, just too long.