From catalog/rfc9110-http.abnf rule: year
Definition
year = 4DIGIT
Info
- Rulename
- year
- Dependencies
- DIGIT, year
- Used Builtins
- DIGIT
Alphabet
0…9
Translations
Railroad Diagram
ECMAScript/JavaScript Regular Expression Literal
/^[0-9]{4}$/
Swift Regular Expression
[0-9]{4}
POSIX Extended Regular Expression
[0-9]{4}