"Please pay attention to the calendar in August this year, believe it or not." This is a very popular joke in Weibo and WeChat recently. The joke mentioned that from August 1 to August 3 1, there are five Fridays, five Saturdays and five Sundays. This phenomenon only happened once in 823, and it is also the only miracle that everyone can see in his life.
Although this discovery seems to be full of mystery, there are still many careful netizens who have discovered the problems.
Magic:
There are five Fridays, Saturdays and Sundays in August this year.
This micro-paragraph appears with the calendar chart.
In the calendar of 2065438+August 2004, five Fridays, five Saturdays and five Sundays in this month are displayed in large font and bold. This passage is a description of this magical discovery: it is a "silver pocket" in the wind and water of China. This phenomenon only happens once in 823 years, and it is the only miracle you can see in your life. If you forward it to your friends within 4 days, there will be unexpected surprises.
In just a few days, Duan Zi became popular in Weibo and WeChat circle of friends. Many netizens are convinced of this, saying "silently forwarding for good luck", and some even call this seemingly magical phenomenon "myth".
Question:
The repetition period cannot be greater than 400 years.
"Why do so many people forward this? Although I have never read a book, you shouldn't lie to me like this. " Netizen @ Yi Yan couldn't bear to see this joke spread wildly in Weibo and WeChat circle of friends.
The reason he gave is simple: 400 years is the minimum cycle of the Gregorian calendar year, which means that at most 400 years, there will be a calendar exactly like 20 14 and a day of the week. The netizen "@ yyyyyyyymm" added: Any claim that a special day has a recurrence period of more than 400 years is nonsense.
Netizen "@ jingjingjingjing" said that after investigation, it was confirmed that there was no word "full of silver pockets" and its expression in Chinese geomantic omen. Moreover, the concept of "day of the week" and the Gregorian calendar both come from the west, which will certainly not be the reference for the ancients to establish the tradition of geomantic omen.
Examples of @ Jiaojiao Moonlight Belongs to the Chinese Cabbage Family: March 20 13, May 20 15, October 20 16 10 and July, with five Fridays, five Saturdays and five Sundays in a month. "As long as the month is a big month, the number 1 appears in the position of Friday, which is actually very common."
Netizen "@ Yu Jingjue _" said that the proliferation of micro-paragraphs should be caused by some Weibo and WeChat marketing accounts "making waves".
Truth:
So August is not magical, four times every 28 years.
This smiling remark reminded chongqing morning post reporters of another news related to calendars at the beginning of this year: 20 14 is exactly the same as 1986' s calendar, which can be directly used to dig out 1986' s old calendar. When the calendar of 1986 is in front of us, and August is also five Fridays, five Saturdays and five Sundays, this rumor is broken.
Through a series of tedious calculations, the reporter came to the conclusion that when March 1 of a certain year is Sunday, no big month in this year can have the phenomenon of five Fridays, five Saturdays and five Sundays; March 1 is Monday, Tuesday, Thursday, Friday and Saturday, and there will be a big month in this year. March 1 is Wednesday, and there are two big months in this year. Counting the difference between a normal year and a leap year, this happened 28 times in 28 years, almost once a year.
The other group aims to calculate that there are three Fridays, three Saturdays and three Sundays in August. The final conclusion is that it will appear four times in 28 years, with an average of once every seven years. (On average, it doesn't mean it will happen once every seven years. For example, from 20 15 to 2024, this 10 year will not appear; However, in the time span of 28 consecutive years, there will definitely be four such cases. )