atlaculture:
Cultural Calendars: Earth Kingdom
Years
Since the Earth Kingdom’s biggest cultural inspiration is China, their traditional calendar would likely be the Chinese lunar calendar. This calendar is made up of 12 months that alternate between 29 and 30 days, as the actual lunar cycle is 29.5 days long. This leads to the Chinese lunar year being shorter than the solar year, resulting in a 13th “leap year month” occurring every few years to re-align the lunar year with the solar year.
Since a year in the Avatarverse is implied to be 360 days (as opposed to our world’s 365.25 days), that means the Earth Kingdom has a “leap month” every 5 years.
Months
As for what the individual Earth Kingdom months are called, they are officially known by their order in the year (e.g. first month, second month, third month, etc.). Since the EK is a vast and diverse country, their month names are intended to be as simple and intuitive as possible. However, different areas may also have their own regional names for the months of the year.
Regarding weeks, the Earth Kingdom follows the xún (旬) system aka 10-day weeks. I’ll just quote the Wikipedia entry:
As early as the Bronze Age Xia dynasty, days were grouped into nine- or ten-day weeks known as xún (旬). Months consisted of three xún. The first 10 days were the early xún (上旬), the middle 10 the mid xún (中旬), and the last nine (or 10) days were the late xún (下旬).
The structure of xún led to public holidays every five or ten days. Officials of the Han dynasty were legally required to rest every five days (twice a xún, or 5–6 times a month).
In short, the first 10 days are called “Early Week”, the second 10 days are “Middle Week”, and the final 9-10 days are “Late Week”.
Unfortunately, due to the time-sensitive and labor-intensive nature of agriculture, peasants could only rest/bathe every tenth day, rather than every fifth day like a government official. Thus, a lighthearted way of noting that someone seems tired or lazy is to say “They look ready to work a bureaucrat’s week”.
Days
Similar to its months, the Earth Kingdom refers to the days by their order in the week, rather than naming them. For example, a person might say “Today is Day 3 of Middle Week.” Since the EK is a vast and diverse country, they try to make their timekeeping as simple and intuitive as possible.
HAVE we seen evidence that an Avatarworld lunar cycle is 29.5 days like Earth’s though? It’s entirely possible that its moon travels a little slower, since the planet clearly orbits its Sun a little faster than Earth, as mentioned in the linked post. Could be a coincidentally convenient 30 day cycle with no need for leap days or months ever, at least not on the frequency that Earth’s calendars do.
Here’s what trips me up the most about the Avatar calendar though:
Since we never see planetary rings from the non-equatorial regions of Avatarworld, it’s probably not that third planet from the sun. SO A.W. must be either the 2nd or the 4th planet from the sun. If Venus and Mars had better atmospheric pressures they’d be within Sol’s Habitable Zone (Venus’ is too high at 93x Earth’s, Mars’ is too low at about 0.02x Earth’s) but their years are also very different (almost 225 days for Venus and about 687 for Mars.
Assuming Agni (I think it would be fair for the Avatar World’s sun to be named after that setting’s Spirit of Fire) is near identical to Sol, then those first four planets have got to be either REALLY tightly crowded around it for the 4th one to have an orbital period that’s “only” 360 days, or the “rocky” planet neighborhood is really sprawled out for the 2nd one to have that kind of orbital period.
There ARE exoplanets out there with crazy tight orbits, I’m talking “years” that only last a couple hours. If Agni has a couple like that, it’s not inconceivable that there’s enough room at the edge of the HZ for A.W. to inhabit the 360 day niche at the 4th position.
Personally though, I think A.W. is a “far Venus” vs a “close Mars”. Planet 2 is noticeably smaller than Planet 4, and with all the crazy acrobatics people are capable of (as well as Appa being able to haul ass ALL OVER the place in Book 3 of ATLA) A.W. has GOT to be the itty bitty one with less surface area to cover and less gravity to hold people down.
Guess we’ll have to wait for Avatar Seven Havens, or its Firebending Avatar successor series, to see if technology improves to the point where they can visit the other planets in that solar system and confirm which it is.
Upon further thought, I also believe that if A.W. is a far Venus, Tui must necessarily be much smaller than Earth’s Luna. It’s obviously a similar apparent size in the sky, since otherwise the “ring of fire” wouldn’t be visible during eclipses if it was too big, and it would barely block out any sunlight at all if it was too small.
But, if A.W. IS less massive than Earth, with correspondingly weaker gravity, then Tui cannot have similar mass to Luna or else Tui and A.W. would be tidally locked to each other like Pluto and Charon, and it wouldn’t have phases. So Tui must be iron-poor compared to Luna, in order to have the right size without too much mass AND maintain analogous-to-Earth phase cycles and eclipse patterns.