How many years since 300 BC?

As of 2019, 300 BC is 2,319 years from today.

As of 2019, it should be 2019 AD.

300 BC refers to 300 years before the first year of AD.

Then using addition, The distance between 300 BC and 2019 is 302019=2319, that is, as of 2019, the distance between 300 BC and 2019 is 2319 years.

Extended information:

Common sense about time

1. A quarter of an hour is 15 minutes

In ancient my country, there was a twelve-hour timing system , hundred-quarter timing system and other timing methods. The twelve-hour system divides the day and night into 12 equal segments, corresponding to the twelve earthly branches, and each hour is divided into the beginning and the right. The hundred-quarter time system comes from the hourglass or water glass, which divides the 24 hours of the day and night into 100 quarters, and each quarter is approximately 14.4 minutes today.

The current 15-minute quarter began in the 8th year of Kangxi (1669), because at that time Western clocks were already used in the palace, and Emperor Kangxi was good at accepting foreign cultures. After 4 years of fierce debate, , and finally changed the original 100 quarters of day and night to 96 quarters, so that each quarter hour becomes 15 minutes, with no remainder, eliminating the trouble of converting Western clock time and traditional Chinese time.

After the 1 hour was changed to 4 quarters in the early Qing Dynasty, its names were: the first quarter, the first quarter, the second quarter and the third quarter. For example, at 3:20, the corresponding expressions were Yinchu quarter and five minutes or three quarters. One quarter and five minutes. This name and usage continued until the founding of New China.

2. Solar terms are not 15 days long

The 24 solar terms belong to the solar calendar and are very fixed in the solar calendar. The first half of the year is on the 6th or 21st, and the second half of the year is on the 8th or 23rd. Its origin is that the 360 ??degrees of the earth's revolution around the sun are divided into 24 equal parts, and the angle passed by each part is 15 degrees. As long as the earth passes through 15 degrees in its orbit, it changes to the next solar term.

Since the Earth rotates faster at perihelion (around December in the Gregorian calendar) and slower at aphelion (around June in the Gregorian calendar), the interval between solar terms is not fixed at 15 days, but sometimes 14 days. Sometimes 16 days.

3. There is "week" but not "worship"

Worship is the worship of Christian believers to the Lord Jesus. According to records, the day of the resurrection of Jesus happened to be Sunday. To commemorate this day, Christianity designated Sunday as Sunday. As time went by, people began to call Sunday Sunday, but those days without worship cannot be called Sundays.

The week system was officially used in my country in the late Qing Dynasty (1905), but its origin is the same as the time culture of China and foreign countries.

In addition to the most obvious two stars, the sun and the moon, the ancients also observed the five other planets in the solar system, and initially grasped the appearance and appearance times of these seven stars and their movement patterns. , Venus, Mercury, Mars, Jupiter, Saturn, and the moon "take turns on duty" in order, forming the most primitive week system. It can also be seen from this sequence that the first day of the week should be Sunday.

Baidu Encyclopedia—AD