4 ms·
It's my understanding that the original basis for months was the lunar cycle, which is astronomical for common definitions of the word. Part of what makes pick
by ghkbrew 12y ago
It's my understanding that the original basis for months was the lunar cycle, which is astronomical for common definitions of the word. Part of what makes picking a calendar difficult is that the ~29.5 day lunar month doesn't fit neatly into the ~365.25 day solar year. So we've ended up with succession of adjustments and fudge factors.
- Thrymr 12y agoThere are a number of lunar calendars that have had long use. The Jewish, Islamic, and Chinese calendars, for example. They are a bit complicated for that reason. The Jewish calendar has the equivalent of "leap months", for example, while the Islamic calendar has a "year" that is ~10 days shorter than an astronomical year.
- zw123456 12y ago13 * 28 = 364, pretty close, you are left with 1.25 as a remainder, so every 4 years have a 5 day leap week.