regex date

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

// Test a string
console.log(pattern.test("2024-01-15")); // true
console.log(pattern.test("2024-13-01")); // false

// Match and extract
const result = "2024-01-15".match(pattern);

import re

pattern = r"^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$"

# Test a string
if re.fullmatch(pattern, "2024-01-15"):
    print("Valid")

# Find all matches in text
matches = re.findall(pattern, text)

import java.util.regex.*;

String pattern = "^\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\\d|3[01])$";
Pattern p = Pattern.compile(pattern);

Matcher m = p.matcher("2024-01-15");
boolean isValid = m.matches(); // true

// Find occurrences
Matcher finder = p.matcher(inputText);
while (finder.find()) {
    System.out.println(finder.group());
}