Blake O'Hare .com

O'Harean Calendar

Note: this explanation of O'Harean has been revised. The times do not match the system used for the times used on my various sites. The dates, however, are the same.

The Gregorian calendar has several different subdivisions of time.

Day:24 hours
Week:7 days
Month:28, 29, 30, or 31 days depending on how well you learned a silly nursery rhyme
Season:91.312425 days
Hour:1/24th of a day
Minute:1/60th of an hour
Second:1/60th of a minute
Year:365 or 366 days (days and years are astronomically defined, so this value is constant)

Many of these subdivisions cycle through themselves independently without any sort of line up with its larger unit. For example, questions of "how many weeks are in a month" or even more useful questions like "how many days are in a month" are fuzzy.

The O'Harean calendar cleans this up by changing durations a teensy bit.

Year:four 90-day seasons + a 5 or 6-day buffer period
Season:exactly 15 weeks
Week:6 days
Day:20 hours
Hour:50 minutes
Minute:100 seconds
Second:1/100000th of a day

The 5 or 6 day buffer period is added to make the year add up to 365 or 366 days and follows the same rules as leap year because this is astronomically defined and beyond the control of redefining subdivisions of time.

It would be silly to use names like "Summer" or "Winter" in the date because "Summer" and "Winter" the season depends on whether you are north or south of the equator. Therefore I will give them different names:

Northern hemisphere Southern hemisphere O'Harean calendar name Latin meaning
SpringAutumnIneo"Begin"
SummerWinterCresco"Rise"
AutumnSpringVigeo"Flourish"
WinterSummerCado"Decline"
5 or 6 day buffer periodAbeo"End"

The way the O'Harean date is written is as follows:

Year Season Week:Day
e.g. 14 Ineo 2:5

The beginning of the year (Ineo 0:0) occurs roughly on the Spring Equinox (because the true astronomical equinox is a point in earth's orbit, not midnight on a particular day). At that point the year in O'Harean is equal to the Gregorian year - 2000. Because year numbers are arbitrary offsets anyway, it makes an easy conversion and also makes the O'Harean year more visually distinct from the Greogrian format.

Week and day count from 0, not 1. This way durations can be more easily calculated by simply multiplying the values that appear in the date by the number of smaller subdivisions appear in that subdivision. For example, 12:4 can easily be recognized as the 76th day of the season because 12 * 6 + 4 = 76. Similarly, if 0, 1, 2, 3 are applied to the seasons, the same computation can be applied to the rest of the date. For example, Vigeo 5:1 is the 211th day of the year:

90 (days in a season) * 2 (Vigeo) + 5 (week number) * 6 (days in a week) + 1 (day number) = 211

(I dare you to figure out how many days into the year October 20th is)

The benefit of seasons over months is that both schools and businesses use this subdivision more commonly than months anyway, calling them "quarters". If months are desired, the 15 weeks per season are easily divisible into 3 groups of 5 weeks. Or if you prefer, 5 groups of 3 weeks.

Concerning time, the day is split into 20 hours. Each hour is split into 50 minutes. Each minute is split into 100 seconds. Hours, minutes, and seconds are all not too different from their original counterparts and the total number of seconds per day is 100,000.

The time is written as a series of numbers separated by periods (to make it visual distinct from a normal time with colons. There is no notion of AM or PM.

Hour.Minute.Second
e.g. 16.08.79

All values are 0-indexed, so the first second of the day is 0.00.00 and the last is 19.49.99.

Daylight savings does not exist in O'Harean.

Time zones are consolidated. There are 7 of them and each spans 3 hours (except for one that spans 2 hours). I have not moved the International Date Line.

Time zones:

  • +0: Pacific east of the International Date Line, including Hawaii and Alaska
  • +2: North America
  • +5: South America
  • +8: Europe and Africa
  • +11: Russia west of Urals, Armenia, Azerbaijan, Georgia, Middle East through Pakistan including former soviet countries that end in Stan
  • +14: Russia between Urals and Lena River, China, Mongolia, India, and Asian countries east of these
  • +17: Russia east of the Lena River, Pacific countries west of the International Date Line.