1- 12 How to distinguish a big month from a small month?

1 month, February, March, April, May, June, July, August, September,1month,1month and1February. The easiest way is to hold your left hand in the shape of a fist and count from the left, where 1 month is the big month when the joints are convex, February is the small month when the middle joints are concave, and then count from the right to July, which is exactly August, and so on.

Extended data:

First, the size of the lunar month.

In the lunar calendar, the months of the year are set according to the cycle of the moon phase, with the 29th of each month as the small month and the 30th as the big month. The length of the calendar month in the lunar calendar is based on the first month of the lunar calendar, and the date of the new moon (that is, the moon is located between the sun and the earth, and the dark half faces the earth) is fixed as the first day of each month-the first day.

The time of the first month of the lunar calendar is 12 hours, 44 minutes and 3 seconds (that is, 29.53059 days), which is a little over 29 and a half days. Because the calendar must use integers, it is stipulated that the first month of the lunar calendar is 30 days and the second month of the lunar calendar is 29 days, which complement each other and make the average length of calendar months close to the first month of the lunar calendar.

But it is not exactly the same as the pure lunar calendar, because the pure lunar calendar is alternately arranged by large and small months, and the size of the lunar year is determined by calculation.

Second, the size of the solar calendar month.

4_6_9_ 1 1 is 30 days of abortion,1_ 3 _ 5 _ 7 _ 8 _10 _/2 is 3 1 day of pregnancy, and the average year is 28 days.

The average solar calendar year is divided into twelve months, the first month is 3 1 day, the second month is 30 days, and the second month is 28 days. The average calendar month is approximately equal to the average length of Wang Shuo's month of 29.5306 days.

There are certain rules for the size of months in the solar calendar. Before July, a single month was a big month and two months was a small month. After August, two months are big months and a single month is small, so January, March, Friday, July, August, October and December are big months and April, June, September and November are small months.

In the julian calendar implemented by Roman dictator Julius Caesar in BC 1, it was originally an alternate month, in which August was originally designated as a small month, because the later dictator Octavian was born in this month, the Senate changed this month to his title "Augustus", and took a day out of February to make up for it, turning it into a big month and rescheduling the following months.

Pope Gregory XIII reformed julian calendar in A.D. 1582 and formulated the Gregorian calendar. Because the earth's cycle around the sun is 365 days, 5 hours, 48 minutes and 46 seconds (365,438+09 days), that is, a year is 365 days. The remaining time is about one day in four years, plus February, so February in a normal year is 28 days and February in a leap year is 29 days.

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