3 ms·

It's even more interesting than you say—the Greeks (and some other Orthodox churches) use the Revised Julian Calendar https://en.wikipedia.org/wiki/Revised_Juli

by dhosek 6y ago

It's even more interesting than you say—the Greeks (and some other Orthodox churches) use the Revised Julian Calendar https://en.wikipedia.org/wiki/Revised_Julian_calendar https://en.wikipedia.org/wiki/Revised_Julian_calendar which aligns with the Gregorian calendar for roughly the millenium spanning 1700–2700. To make this work, they had their own skippage of days in 1923.

skissane 6y ago
The Gregorian and Revised Julian calendars agree up to 28 February 2800. The next day, they begin to diverge – 28 Feb 2800 is followed by 29 Feb 2800 in the Gregorian, but 1 March 2800 in the Revised Julian, and from then onwards the Revised Julian Calendar remains one day ahead. In 2900, they pull temporarily back into synch; in that year, the Revised Julian Calendar has a leap year, but the Gregorian doesn't. In the year 3200, they fall out of synch again, and the Revised Julian once again becomes one day ahead of the Gregorian. I really wonder what the Gregorian-calendar-using parts of the Eastern Orthodox Church are going to do in the year 2800 – assuming they are still around. Will they remember they are supposed to be using the Revised Julian calendar instead of the Gregorian? Or will they decide that being a day ahead of the civil calendar isn't worth the hassle? Maybe by the year 2800 there will be people living on Mars, and maybe even some of them will be Christians, even Eastern Orthodox Christians. I wonder if they will insist on using the Earth calendar, complete with Earth days of exactly 86,400 seconds, and with the boundary between Earth days shifting awkwardly through the Martian day? Or will they adopt a liturgical calendar based on the Martian sol (which is 2219.6 seconds longer than the Earth day)? Do they use the Martian year of 668 sols, or the Earth year of 355 sols, as their liturgical year? The whole Gregorian vs Julian debate, which is still alive in the Eastern Orthodox Church, makes little sense on Mars.
- dhosek 6y ago
  The whole concept of interplanetary calendars and time keeping will be interesting to see how it's resolved (assuming our species lives long enough for it to matter). It makes the current mess of time zones, daylight savings/summer time and leap seconds seem trivial by comparison. At least the Martian day isn't very different in length from the Earth day, but how will our biology adapt to colonization on a planet where, say, a day is 15 hours or 36 hours?

by dhosek 6y ago

skissane 6y ago

The Gregorian and Revised Julian calendars agree up to 28 February 2800. The next day, they begin to diverge – 28 Feb 2800 is followed by 29 Feb 2800 in the Gregorian, but 1 March 2800 in the Revised Julian, and from then onwards the Revised Julian Calendar remains one day ahead. In 2900, they pull temporarily back into synch; in that year, the Revised Julian Calendar has a leap year, but the Gregorian doesn't. In the year 3200, they fall out of synch again, and the Revised Julian once again becomes one day ahead of the Gregorian. I really wonder what the Gregorian-calendar-using parts of the Eastern Orthodox Church are going to do in the year 2800 – assuming they are still around. Will they remember they are supposed to be using the Revised Julian calendar instead of the Gregorian? Or will they decide that being a day ahead of the civil calendar isn't worth the hassle? Maybe by the year 2800 there will be people living on Mars, and maybe even some of them will be Christians, even Eastern Orthodox Christians. I wonder if they will insist on using the Earth calendar, complete with Earth days of exactly 86,400 seconds, and with the boundary between Earth days shifting awkwardly through the Martian day? Or will they adopt a liturgical calendar based on the Martian sol (which is 2219.6 seconds longer than the Earth day)? Do they use the Martian year of 668 sols, or the Earth year of 355 sols, as their liturgical year? The whole Gregorian vs Julian debate, which is still alive in the Eastern Orthodox Church, makes little sense on Mars.

dhosek 6y ago
The whole concept of interplanetary calendars and time keeping will be interesting to see how it's resolved (assuming our species lives long enough for it to matter). It makes the current mess of time zones, daylight savings/summer time and leap seconds seem trivial by comparison. At least the Martian day isn't very different in length from the Earth day, but how will our biology adapt to colonization on a planet where, say, a day is 15 hours or 36 hours?