How to write a preface in classical Chinese now?

In ancient times, the date of signature was generally written in the lower left corner and vertically.

The date of modern calligraphy can be in AD, but Arabic numerals are not used. March 3rd of 20 15 can be written as March 3rd of 20 15. If the date is written in China's traditional calligraphy, we must first understand that 2065438+March 3, 2005 is the 13th day of the first month of the second year of the lunar calendar (Year of the Sheep).