Regex for 24-Hour Time

javascript

const regex = /^([01]\d|2[0-3]):([0-5]\d)$/;
const isValid = regex.test(value);

python

import re
pattern = r'^([01]\d|2[0-3]):([0-5]\d)$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^([01]\d|2[0-3]):([0-5]\d)$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^([01]\d|2[0-3]):([0-5]\d)$/', $value)) {
    echo "valid";
}

java

String pattern = "^([01]\\d|2[0-3]):([0-5]\\d)$";
boolean isValid = value.matches(pattern);