Hebrew Calendar

[travisgoodspeed]

As the first watch with a radio transceiver that is arguably kosher for shabbat (#101), it would be nice if the watch could also display dates in the Hebrew calendar. Because mistakes might easily be left unfound for years, the test case should compare dozens of calendar dates across the next several years with a host-side library.

The RTC will remain in the standard calendar, with conversions performed as necessary to show the date.

Examples: ynd cal-hebrew.el from emacs Hebrew Calendar

Features:

• [x] App Skeleton
• [x] Display Day of Week (trivial)
• [x] Display Day of Month
• [x] Display Month Name (Not abbreviated as a number.)
• [ ] Display Leap Month (Adar 1) properly.
• [x] Accurate date conversion from the RTC.
• [ ] Integration with Shabbat applet #101.
• [x] Test suite runs.
• [x] Test suite accurately verifies the applet.
• [ ] Fall Through Mode with the Clock applet. #139

[travisgoodspeed]

Shavua tov!

I've ported the example from ynd and added test cases. The test suite also displays the current day, month, year, and day of week for manual verification.

% ./libs/hebrew 
Gregorian: 2020.01.19, DOW=0
Days since 1900: 43847
Hebrew: 22    Tevet 5780,   Rishon