Hebrew Date Converter | ממיר תאריכים

A bilingual (Hebrew/Civil) date conversion tool with a Streamlit web interface.

Features

• Convert Hebrew dates to Gregorian dates
• Convert Gregorian dates to Hebrew dates
• Handles leap years (שנה מעוברת), variable month lengths (Heshvan/Kislev)
• Interface in Hebrew

Stack

• Python 3
• Streamlit

Project Structure

├─ calendarcomputing.py  # Core calendar logic (Hebrew calendar algorithms)
└─ memir.py              # Streamlit web interface

Run locally

pip install streamlit
streamlit run memir.py

How it works

calendarcomputing.py implements the Hebrew calendar computation from scratch:

• Molad calculation (lunar cycle approximation)
• Dechiyot rules (postponement rules for Rosh Hashana)
• Bidirectional conversion between Hebrew and Gregorian day counts

memir.py is the Streamlit UI layer, with two panels:

• Right panel: Gregorian → Hebrew
• Left panel: Hebrew → Gregorian

Notes

• Hebrew year input must be a number (e.g. 5785)
• The app dynamically adds Adar Aleph/Bet options for leap years