Gregorian calendar signature: 20 1 1 June/year 1 day.
Inscription of the Lunar New Year: Xin Mao Year is Xin Mao Year (20 1 1 is Xin Mao Year, and June 1 is April 30th of the lunar calendar; The fourth month of the lunar calendar can be called lack of moon, locust month, mid-month, wheat month, clear and harmonious month, cloudy month, full moon, locust summer, early summer, early summer, Xia Wei, Zhengyang, Chunyang, Maihou, Xia Meng, Lv Zhong, Mitsuki and so on. The dates recorded in the old calendar are divided into upper, middle and lower rings, from Sheung Wan 1 day to 10, Central1day to 20, and Lower Ring 2 1 day to 30), or it can be directly recorded as "Xia Meng in the New Year of Xinmao".
Gregorian inscriptions can clearly record the creation date of a work, so many contemporary calligraphers push this move.
Of course, learning ancient calligraphy can get its charm, and the lunar calendar is still the first choice for many calligraphers.