Hebrew Calendar Date Regex for Python

What this pattern does

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

Python Implementation

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

import re

hebrew_calendar_date_pattern = re.compile(r'^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[0-3])/(5[0-9]{3}|6[0-9]{3})$')

def validate_hebrew_calendar_date(value: str) -> bool:
    return bool(hebrew_calendar_date_pattern.fullmatch(value))

# Example
print(validate_hebrew_calendar_date("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 Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. 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.