从古代殷朝汉朝一直到民国，然后到新中国成立，元旦和春节的演变是一个很长的历史过程。

此文简单的介绍了元旦和春节的含义及由来。In ancient China, Yuan Dan was not on January 1st, as regulated in the Gregorian calendar. The date of Yuan Dan had been changed many times from the 1st of the 12th lunar month in Yin Dynasty to the 1st of the 1st lunar month in Han Dynasty.在古代，按公历来说，元旦不是一月一号这一天。元旦的日期从殷朝腊月初一改到汉朝的正月初一。In Jin Shu, compiled by Fang Xuanling in the Tang Dynasty, the first lunar month was called Yuan and the 1st day was called Dan.