Custom Calendar and Scheduler

Custom calendar ideas

Should support

Dates

Gregorian date

365 days in the usual combination of 12 months, one extra day (29th February) on leap years.

Leap years are:

• divisible by 4
• not divisible by 100 years
• divisible by 400 years

Julian date

365 days in the usual combination of 12 months, one extra day (29th February) on leap years.

Leap years are:

• divisible by 4

Ethiopian date

365 days in 12 months of 30 days + 5 or 6 (on leap years) extra days in a "13th" month.

Leap years are:

• divisible by 4

Han date

(Traditional Chinese calendar) 12 or 13 months with 29 or 30 days, depending on the lunar cycle (months start and end on a new moon) per year.

Leap years are on a 19-year Metonic cycle:

• lcclcclcclclcclcclc

Dorian date

(Martian calendar)

24 months of 27 or 28 days. 668 days per year on "normal" years, 669 on "leap" ones

Month names:

Sagittarius Dhanus Capricornus Makara Aquarius Kumbha Pisces Mina Aries Mesha Taurus Rishabha Gemini Mithuna Cancer Karka Leo Simha Virgo Kanya Libra Tula Scorpius Vrishika

Leap years are:

• odd (not divisible by 2) or divisible by 10 (end in a 0)
• not divisible by 100
• divisible by 500

Day divisions

In equal parts

• day/night
• quarters (morning, noon, evening, midnight)
• twelves (see: traditional Chinese/Han calendar)
• hours
• hours + minutes
• hours + minutes + seconds

In an enumerated part list

Example: Morning, Noon, Afternoon, Evening, Night