How to determine the Buddhist calendar?

1950, the World Buddhist Friendship Association held its first meeting in Colombo, Ceylon, and discussed the historical facts about the birth, enlightenment and nirvana of the Buddha, as well as the age of becoming a monk, enlightenment and nirvana. Because there are differences between Southern Buddhism and northern Buddhism, the details are as follows:

1. The Buddha was born on the full moon in May 623 BC (this is the Indian calendar. In China, the eighth day of the fourth lunar month.

2. The Buddha became a monk at the age of 29 and 35. That is, in 588 BC, at the full moon in May (according to the China calendar, the twelfth lunar month, that is, the eighth day of December, is the Buddha's enlightenment day), he was enlightened day and night.

Three, Buddha said forty-five years, eighty years old nirvana, that is, in 543 BC, the full moon in May entered and disappeared at midnight (China calendar, February 15th of the lunar calendar is the Buddha's nirvana day).

Fourthly, the calculation of Buddhist calendar.

The Buddhist calendar starts from the year of Buddha's nirvana, and every Christmas of Buddha is regarded as a new year to change the number of years.

Calculation method of Buddhist calendar:

That is, the Buddha was born in 623 BC minus the Buddha's life span of 80 years, that is, 543 BC was the year of Buddha's nirvana (Buddha's nirvana was in 543 BC).

This year's year is 543,2006, and the year is 2549. This is the number of Buddha years before the Buddha's birthday (the eighth day of April) this year.

But after the Buddha's birthday this year (the eighth day of April), it should be increased by one year. So this year's Buddha's birthday is 2550 years after 2006.

Calculation method of Buddhist calendar, and so on.