Hebrew Calendar Date Regex for PHP

What this pattern does

This page provides a well-structured, multi-part regular expression for matching hebrew calendar date, ported and verified for PHP. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your PHP project — whether you're validating in a Laravel validator, a WordPress plugin, or a standalone PHP script.

Php Implementation

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

define('HEBREW_CALENDAR_DATE_PATTERN', '/^(0?[1-9]|[12][0-9]|3[01])\/(0?[1-9]|1[0-3])\/(5[0-9]{3}|6[0-9]{3})$/');

function validate_hebrew_calendar_date(string $input): bool {
    return (bool) preg_match(HEBREW_CALENDAR_DATE_PATTERN, $input);
}

// Example
var_dump(validate_hebrew_calendar_date("15/7/5784")); // bool(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 PHP developers because especially relevant in PHP where PCRE backtracking limits can trigger silent failures on malicious input. 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.