Hebrew Calendar Date Regex for Java

What this pattern does

This page provides a well-structured, multi-part regular expression for matching hebrew calendar date, ported and verified for Java. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Java project — whether you're validating in a Spring Boot controller, a Jakarta EE service, or a standalone utility class.

Java Implementation

// Hebrew Calendar Date
// ReDoS-safe | RegexVault — Localization > Date Formats

import java.util.regex.Pattern;

public class HebrewCalendarDateValidator {
    private static final Pattern PATTERN =
        Pattern.compile("^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[0-3])/(5[0-9]{3}|6[0-9]{3})$");

    public static boolean validate(String input) {
        return PATTERN.matcher(input).matches();
    }

    // Example
    public static void main(String[] args) {
        System.out.println(validate("15/7/5784")); // true
    }
}

Test Cases

When to use this pattern

This pattern is drawn from the Localization > Date Formats category and carries a ReDoS-safe certification. That matters for Java developers because critical in Java applications since the JVM regex engine uses backtracking and is susceptible to ReDoS without careful pattern design. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Hebrew calendar has 12 or 13 months (leap years add Adar II, hence month 13). Current year range 5700s-6000s (2024 CE = 5784-5785 AM). Month 13 is only valid in leap years — validate with a Hebrew calendar library.