The writing brush writes March 1st

The answer is as follows:

The signatures of March in the lunar calendar are: Ji Chun, Chen Yue, Bing Yue, Gu Xi, Tao Yue, Late Spring, Tong Yue, Late Spring, Chun Qi, Yu Chun.

The inscriptions on the first day of each month are: Shuo, Dan, and E

So the first day of the third lunar month in 2020 can be combined with the above inscriptions, such as: Gengzi Spring Festival.