The solar calendar, also known as the solar calendar, is a calendar based on the movement cycle of the earth around the sun.

The Gregorian calendar year is approximately equal to the tropic year, one year 12 months. This "month" has nothing to do with the first lunar month.

The month and date of the solar calendar are very consistent with the position of the sun on the ecliptic. According to the date of the solar calendar, we can clearly see the changes of cold and warm seasons in a year. But every month, you can't see the new moon, the new moon, the new moon.

At present, the Gregorian calendar, which is commonly used in the world, is a solar calendar, with 365 days in a normal year and 366 days in a leap year, once every four years, once in a hundred years and once again in the 400th year, that is, there are 97 leap years every 400 years. The average length of the Gregorian calendar is only 26 seconds away from the tropic year, and it takes only one day to accumulate 3300 years.

How many names do we call the solar calendar? Gregorian calendar = Gregorian calendar = Gregorian calendar

As shown in the picture, Arabic numerals written in lowercase letters are solar calendars, and uppercase numerals are lunar calendars.

What is the lunar calendar? The lunar calendar is a traditional calendar in China, and it also has names such as lunar calendar, Chinese calendar, summer calendar, Han calendar and national calendar. It is a kind of lunar calendar. It takes the change period of the moon phase as the length of a month and refers to the length of the tropical year of the sun. By setting leap months, the average calendar year adapts to the tropic year. According to the first year of Xuanyuan Huangdi, the ancestor of China, this year is 47 14 Ding You Year of the Rooster (Gregorian calendar 2017.1.28 ~ 2018. 02.15). Our traditional calendar is 2697 years earlier than the western calendar, and +2697 is the year of our traditional calendar.

Lunar calendar is a traditional calendar in China, also known as Chinese calendar, summer calendar, Chinese calendar, national calendar and commonly known as lunar calendar. The method of determining the month is given by the cycle of the first month of the lunar calendar. The first lunar month is the first lunar month, and the first lunar month is about 29 and a half days, so the first lunar month is 30 days and the second lunar month is 29 days. There are 12 months in the lunar calendar, 354 days or 355 days in the whole year, and 13 months in leap years. A month is a leap month, and the name of the month depends on the name of the previous month. For example, the previous month is August and the leap month is leap August. There are 383 or 384 days in leap years. The way to set a leap month is that there is no "neutral" month in the lunar calendar as a leap month.

How many names do we usually use to represent the lunar calendar?

Lunar calendar = lunar calendar, summer calendar, Chinese calendar and national calendar, commonly known as lunar calendar.