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24-Hour Time (HH:mm) Regex
Validates 24-hour military and European clock time from 00:00 through 23:59.
Regular Expression Pattern:
/^(?:[01]\d|2[0-3]):[0-5]\d$/
Valid Match Example:
23:59
Invalid / Non-Match Example:
24:00
Regex Syntax Breakdown & Explanation
- •[01]\d|2[0-3] : Restricts hours from 00 to 23
- •: : Colon separator
- •[0-5]\d : Restricts minutes from 00 to 59
Implementation in Popular Languages
JavaScript / TypeScript
const regex = /^(?:[01]\d|2[0-3]):[0-5]\d$/;
const isValid = regex.test("23:59");
console.log(isValid); // truePython (re)
import re pattern = r"^(?:[01]\d|2[0-3]):[0-5]\d$" match = re.match(pattern, "23:59") print(bool(match)) # True
Go (regexp)
package main
import (
"fmt"
"regexp"
)
func main() {
re := regexp.MustCompile(`^(?:[01]\d|2[0-3]):[0-5]\d$`)
fmt.Println(re.MatchString("23:59"))
}Frequently Asked Questions
Frequently Asked Questions
Everything you need to know regarding specifications, syntax, and security best practices.
The regular expression pattern is /^(?:[01]\d|2[0-3]):[0-5]\d$/. Validates 24-hour military and European clock time from 00:00 through 23:59.