How many days, hours, minutes and seconds are there in a year?

If a year is calculated as 365 days, a year =365 days =8760 hours =525600 minutes =3 1536000 seconds.

It is a year for the earth to go around the sun. It has two periods, one is the sidereal year, that is, 6: 09: 10 second on 365, and the other is the tropic year formed by the direct sun moving back and forth between the tropic of cancer, that is, 5: 48: 46 on 365.

Before the founding of the Republic of China, the twelve earthly branches were used to measure time. The earthly branch not only represents the year, month and day, but also the time, and divides a day into twelve hours: Zi, Ugly, Yin, Mao, Chen, Si, Noon, Unfinished, Shen, You, Xu and Hai. After the founding of the Republic of China, the year, month, day and time were marked by the year of AD, while the lunar calendar in China was preserved. In AD, a day was divided into 24 hours, which was twice as short as the traditional 12 hour, so it was called an hour.

Extended data:

Except leap second, one hour is generally equal to 3600 seconds, or 60 minutes, or 1/24 days. The time measurement of human daily life is generally carried out in hours. The time of human daily life is generally measured in hours. For example, the time in a day, for example, 8 am, is the eighth hour in a day.

1 hr = 60min min (m) = 3600s.

In ancient China, time was measured by the method of "dripping water from a copper pot", and day and night were divided into twelve hours. One hour is equivalent to two hours of western clocks. When clocks and watches were introduced to China from the west, people called an hour "striking time" in China and a new hour "striking time" in the west. Later, with the popularity of clocks and watches, the word "Da Shi" gradually disappeared, and "Shi" has been used to this day.

References:

Baidu encyclopedia-hours