Look at a Linux operating system command to understand a human civilization

Today, I accidentally saw an introduction to the history of a date in Linux on a blog. It was very curious to test it according to the method introduced by others. CODE: cal 9 1752 You can see:

September 1752

SM Tu W Th FS

1 2 14 15 16

17 18 19 20 21 22 23

24 25 26 27 28 29 30

It was discovered that the back of September 2, 1752 was 14 days.

The reasons are as follows: February 2582, Rome The Holy See requested that 10 days be subtracted from mid-October 1582, so that October 4, 1852 was followed by 15 days. In Italy, Spain and other countries have handled this. Other Catholic countries quickly followed this, but the Protestant countries were reluctant to revise, and the Orthodox countries such as Greece were not revised until the early 20th century, so the reform was only implemented in Britain and its colonies (including the United States) in September 1752. . So September 2, 1752, followed by September 14, 1752.

But under Windows, because the date of the computer can't be recalled at that time (the earliest can only show 1980), so call VC's calendar control to write a perpetual calendar, September 1752 is normal, it seems this It is a history that depends on Linux to understand.