Regex for Date YYYY-MM-DD

javascript

const regex = /^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$/;
const isValid = regex.test(value);

python

import re
pattern = r'^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$/', $value)) {
    echo "valid";
}

java

String pattern = "^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\\d|3[01])$";
boolean isValid = value.matches(pattern);