Question charts that simplify reality. |
There are 13 moonths every year because a day is 24 hours, a week is 7 days, and a moonth -- which contains one full moon and each of the other lunar phases -- is 4 weeks long: 4x7=28, and 28x13=364. The additional day, New Year's Day, is zero. All counting begins at zero (0-9) not 1 (1-10). Why? See video below.
The Catholic/Christian Church ruined intuitive timekeeping, when everyone knew the seasons, knew the time of moonth by the universally-visible phase in the sky, but then 13 was demonized and made an object of fear.
Leap day, leap year, leap nonsense. Here's math genius Scott Flansburg's alternative giving us a SUPERIOR CALENDAR that works for everyone all the time.
CALENDAR
The Human Calculator Calendar has 365 days, divided into 13 months of 28 days (13 x 28 = 364). The extra day is the ZERO DAY, the rest day of the year. There are 13 months, numbered 0-12. Every month has four weeks. Every month starts on a Wednesday and ends on a Tuesday. This way every date falls on the same day of the week every month. It's intuitive and easy. Questions, comments, suggestions? Visit thehumancalculator.com.
- Scott Flansburg
The Guinness Book of World Records' "Human Calculator"
The Mayan Calendar is very advanced and moving. This is the simpler Aztec Calendar. |
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Lunar time? (forestsangha.org) |
The term leap year probably comes from the fact that a fixed date in the Gregorian calendar normally advances one day of the week from one year to the next, but the day of the week in the 12 months following the leap day (from March 1 through February 28 of the following year) will advance two days due to the extra day, thus leaping over one day in the week.
For example, Christmas Day (December 25) fell on a Tuesday in 2012, Wednesday in 2013, Thursday in 2014, and Friday in 2015, but then leapt over Saturday to fall on a Sunday in 2016.
The length of a day is also occasionally corrected by inserting a leap second into Coordinated Universal Time (UTC) because of variations in Earth's rotation period. Unlike leap days, leap seconds are not introduced on a regular schedule because variations in the length of the day are not entirely predictable.
Leap years can present a problem in computing, known as the leap year bug, when a year is not correctly identified as a leap year or when February 29 is not handled correctly in logic that accepts or manipulates dates. More