Zmanim Calculator

Calculate Halachic times for any location and date. Powered by the hebcal Python library and NOAA sunrise/sunset algorithms.

Quick Start

# Today's zmanim for current location (auto-detected IP)
zmanim today

# Shabbos times for a specific city
zmanim shabbos --city "New York, NY"

# Full zmanim table for a date
zmanim --date 2026-05-15 --lat 40.7128 --lon -74.0060

# Candle lighting time
zmanim candles --city "Jerusalem"

# Daf Yomi for today
zmanim daf

# Weekly parsha
zmanim parsha

Commands

Output Format

📅 Zmanim for Brooklyn, NY — Friday, May 15, 2026
───────────────────────────────────────────────
🕯️ Candle Lighting (18 min):  7:42 PM
🌅 Shkiah (Sunset):           8:02 PM
🌙 Tzeis (72 min):            9:14 PM
🌄 Dawn (Alos HaShachar):     4:12 AM
☀️ Netz HaChamah (Sunrise):   5:42 AM
📖 Sof Zman Shema (Gra):      9:24 AM
📖 Sof Zman Shema (M'A):      8:48 AM
🕰️ Chatzos (Midday):          12:52 PM
🕰️ Mincha Gedolah:           1:12 PM
🕰️ Mincha Ketanah:           4:52 PM
🕰️ Plag HaMincha:            6:27 PM
🌅 Shkiah:                    8:02 PM

Installation

pip3 install hebcal-python python-dateutil

Or use the bundled script (no dependencies):

python3 scripts/zmanim.py --city "New York, NY"

API

from scripts.zmanim import get_zmanim, get_shabbos_times, get_daf_yomi

# Get all zmanim for a location
times = get_zmanim(lat=40.7128, lon=-74.0060, date="2026-05-15")
print(times['candle_lighting'])

# Shabbos times
shabbos = get_shabbos_times(city="Brooklyn, NY")
print(f"Candles: {shabbos['candle_lighting']}")
print(f"Havdalah: {shabbos['tzeis_72']}")

# Daf Yomi
daf = get_daf_yomi()
print(f"Today: {daf['tractate']} {daf['daf']}")

Configuration

Create ~/.config/zmanim/default.json:

{
  "default_city": "Brooklyn, NY",
  "candle_lighting_minutes": 18,
  "tzeis_minutes": 72,
  "timezone": "America/New_York"
}

Data Sources

• Hebcal API — Jewish calendar calculations
• NOAA — Sunrise/sunset algorithms
• GeoNames — City-to-coordinates lookup

Limitations

• Location lookup requires internet (or cached coordinates)
• Extreme latitudes (near poles) may have edge cases
• Yom Tov dates use Hebrew calendar; verify against local minhag