(1) date expression
1 month 1 day: 1 month 1 day.
March 25th: March 25th.
1. January 1st January 1st
February third, February third.
Today is January 1st.
Today is January 1st.
1 month 1 day 1 month 1 day
December 2 nd, December 2 nd
May 2 1997. 1May 2, 997
1998 1998 1 2nd of the month.
If you don't explain it one by one, you will probably know it yourself. Actually, there are many expressions.