According to the rotation cycle, how many time zones does human divide the earth's surface into, how many hours does each time zone represent, and how many hours is the difference between two adjacent time zones?

According to the rotation cycle, how many time zones does human divide the earth's surface into, how many hours does each time zone represent, and how many hours is the difference between two adjacent time zones?

It's divided into 24 time zones!
Each time zone represents an hour
The difference between the central meridians of adjacent time zones is 1 hour

How many time zones does the earth have?

East 12 and West 12 are the same time zone, 0 is the same time zone. So there are 24 time zones!
(it's terrible to have no culture)

How many days in total from March 4, 2010 to August 21, 2012

1. 3, 5, 7, 8, 10, 12 are big months, 31 days
4. 6, 9 and 11 are all moons, 30 days
There are 28 days in February 2011 and 29 days in February 2012
Calculate the days from March 4, 2010 to August 21, 2012:
① From March 4, 2010 to December 31, 2010: (31-4 + 1) + 30 * 4 + 31 * 5 = 303 (days)
② 2011: 365 (days)
③ From January 1, 2012 to August 21, 2012: 29 + 30 * 2 + 31 * 4 = 213 (days)
Total: 881 (days)