Skip to content
Tools for making an Aquatic Jewish calendar.
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.

The Aquatic Jewish Calendar


Download the calendar here.

I recently attempted to research Aquatic Judaism for a personal project, but soon realized that almost no information about the religion exists on the Internet. In response, I've created this Aquatic Jewish calendar specifically for Terrestrial Jews, as an educational aid to better understand their Aquatic brethren.

The Terrestrial and Aquatic Judaism calendars differ in some crucial respects. The secular (Gregorian) calendar is solar: days, months, and years are based on the Earth's movement around the Sun. The Terrestrial Jewish calendar is lunisolar: Each month starts at a new moon, and each day starts at sunset. The Aquatic Jewish calendar is lunitidal: Each month starts at a new moon, and each day starts at high tide.

The sinusoidal waves on this calendar are graphs of predicted tidal heights in Boston, Massachusetts. For most observant Aquatic Jews, this alone is insufficiently accurate. The prudent Aquatic Jew will listen for the sound of the shofar at hide tide to determine when the day has begun or ended.

All images in this calendar are from the Met's open access collection

All tidal data was gathered from the NOAA website

Creating Your Own Aquatic Calendar

Email subalterngames at gmail dot com and I'll happily create a calendar for you.

If you want to try making your own calendar, this repo contains most of the tools required.

Required Software

  • python3
    • pathlib
    • matplotlib
    • dateutil
    • argparse
  • LaTeX
    • scrbook
    • colorbtl
    • tabularx
    • marginnote
    • graphicx
    • wasysym
    • sectsty
    • xcolor
    • background

How to run the program


This will generate a .tex file, which you can then turn into a pdf with LaTeX.

Optional arguments

Argument Description Default
-t <path> path/to/your/tidal/data.csv tide_data/boston.csv
-p Create new tidal graph images. False

Getting tidal data

This repo does not contain the tools needed to get tidal data. I went to the NOAA website, set the range to 1 year (September 9 2018 to September 9 2019), set the location to Boston, the increment to one hour... And then highlighted the results with my mouse and copy-pasted into Excel.

There is probably a more elegant way to do this.

You can’t perform that action at this time.