REGEXVAULTv2.0
Localization/Date Formats
Verified Safe

Abbreviated Month Name (English) Regex for PHP

/^(?:(0?[1-9]|[12][0-9]|3[01])[\-\s](Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[\-\s]((?:19|20)[0-9]{2})|(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+(0?[1-9]|[12][0-9]|3[01]),?\s+((?:19|20)[0-9]{2}))$/i

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching abbreviated month name (english), 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
<?php
// Abbreviated Month Name (English)
// ReDoS-safe | RegexVault — Localization > Date Formats

define('ABBREVIATED_MONTH_NAME_ENGLISH_PATTERN', '/^(?:(0?[1-9]|[12][0-9]|3[01])[\-\s](Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[\-\s]((?:19|20)[0-9]{2})|(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+(0?[1-9]|[12][0-9]|3[01]),?\s+((?:19|20)[0-9]{2}))$/');

function validate_abbreviated_month_name_english(string $input): bool {
    return (bool) preg_match(ABBREVIATED_MONTH_NAME_ENGLISH_PATTERN, $input);
}

// Example
var_dump(validate_abbreviated_month_name_english("15-Jan-2024")); // bool(true)

Test Cases

Matches (Valid)
Rejects (Invalid)
15-Jan-202415-January-2024
15 Jan 2024Jan-15-2024
Jan 15 202415-JAN-24
Jan 15, 2024Jan 15 24
31-Dec-1999

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

Oracle and some databases use uppercase abbreviated months internally (15-JAN-2024). Apply case-insensitive matching or normalize before comparison.

Technical Notes

DD-Mon-YYYY is common in Oracle databases and UK bank statements. Mon DD, YYYY is common in American printed documents. The month abbreviation is always 3 letters.

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