5 Fridays, Saturdays and Sundays. Is it difficult for August to happen like this?

Through checking by netizens and reporters from Chongqing Morning News, August happens like this four times every 28 years, and this kind of month happens almost every year.

“Please pay attention to the calendar for August this year. Believe it or not." This is a popular joke on Weibo and WeChat recently. The joke mentioned that from August 1st to 31st, there were 5 Fridays, 5 Saturdays and 5 Sundays. This phenomenon only occurs once in 823 years, and is the only miracle that everyone can see in their lifetime.

Although this discovery seems to be full of mystery, many attentive netizens still discovered problems.

Magic:

There are 5 Fridays, Saturdays and Sundays in August this year

This micro-joke appears together with a calendar picture .

In this August 2014 calendar, use larger font size and bold font to indicate the 5 Fridays, 5 Saturdays, and 5 Sundays that appear in this month. The text content of the paragraph is a description of this magical discovery: This is the "silver pocket" in Chinese Feng Shui. This phenomenon only occurs once in 823 years. It is also the only miracle you can see in your life, within 4 days. Forwarding it to friends will bring unexpected surprises.

In just a few days, the joke became popular in Weibo and WeChat Moments. Many netizens were convinced of this and said they were "silently forwarding it for good luck", and some even called this seemingly magical phenomenon a "myth".

Question:

The recurrence period cannot be greater than 400 years

“Why do so many people repost this? Although I haven’t read the book, you shouldn’t either You lied to me like this." Netizen "@有一眼" couldn't stand seeing this joke going viral on Weibo and WeChat Moments.

The reason he gave is simple: 400 years is the minimum cycle of the Gregorian calendar year, which means that after a maximum interval of 400 years, the calendar and day of the week will appear exactly as in August 2014. Netizen "@能猫MM" also added: Any claim that the recurrence period of a special day is greater than 400 years is nonsense.

Netizen "@RabbitXiaoyi'er" said that after investigation, it was confirmed that the term "full of silver pockets" and its description are not included in Chinese Feng Shui. Moreover, the concept of "days of the week" and the Gregorian calendar are all introduced from the West, so they will certainly not become the basis for reference when the ancients set up Feng Shui traditions.

"@ proudly belong to the cabbage family's Moon Night" gave examples: March 2013, May 2015, January and July 2016, all of which had 5 occurrences within one month. Fridays, five Saturdays, and five Sundays. "As long as the month is a big month and the 1st appears on Friday, it's actually very common."

Netizen "@jingyujue_" said that the proliferation of this micro-joke should be caused by some Weibo and WeChat marketing accounts "making trouble".

Truth:

August is not magical, it happens 4 times every 28 years

This micro-joke made the Chongqing Morning News reporter immediately think of the beginning of this year Another calendar-related news: the 2014 calendar is exactly the same as the 1986 calendar. You can directly pull out the old 1986 calendar and use it. When the 1986 calendar was in front of us, and August also had 5 Fridays, 5 Saturdays, and 5 Sundays, this rumor was self-defeating.

Through a set of more tedious calculations, the reporter came to the conclusion: when March 1 of a certain year falls on a Sunday, no big month in that year can have five Fridays. , the phenomenon of 5 Saturdays and 5 Sundays; when March 1st falls on Monday, Tuesday, Thursday, Friday, and Saturday, there will be a big month in this year where this phenomenon occurs; when March 1st falls on On Wednesday, this will happen for two big months of the year. Taking into account the difference between ordinary years and leap years, this situation occurs 28 times in 28 years, almost once every year.

Another group aims to calculate the situation when August has 3 Fridays, 3 Saturdays, and 3 Sundays.

The final conclusion is that it will occur 4 times in 28 years, with an average of once every 7 years. (The average does not mean that it will definitely happen once in 7 years. For example, in the 10 years from 2015 to 2024, it will not happen; but in a span of 28 consecutive years, it will definitely happen 4 times in total. situation. )