From catalog/rfc9110-http.abnf rule: second

Definition

second = 2DIGIT

    

Info

Rulename
second
Dependencies
DIGIT, second
Used Builtins
DIGIT

Alphabet

Translations

Railroad Diagram

second DIGIT DIGIT

ECMAScript/JavaScript Regular Expression Literal

/^[0-9]{2}$/

Swift Regular Expression

[0-9]{2}

POSIX Extended Regular Expression

[0-9]{2}