Date: Use ordinal number.
Example: 1 October 1 day:1October1,1October 1st,1October 1Oct,/kloc-. October 1Oct can be written in abbreviated form.
Reading: October 1st or October 1st.
Extended data:
Sometimes ordinal numbers can be expressed by abbreviations. The main abbreviations are as follows:
1, the first one-1st
2. Second-second
3. Third-third
4. Fourth-fourth
5, sixth-sixth
6, 20th-20th.
7. 23rd-23rd
Where 1st, 2 and 3 are special forms, and the rest are Arabic numerals followed by th.