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Kozmos Clock and Calendar is an alternative timekeeping system developed by American Matteo Maisano in 2011. The system uses a decimal time format in place of the traditional clock and a five-month calendar of equal-length months in place of the Gregorian calendar. All time is anchored to a single global reference point, eliminating time zones. The name derives from κόσμος (kosmos), the Koiné Greek word meaning "world."
Background
Various alternative timekeeping proposals have been put forward over the centuries, including decimal time (briefly adopted during the French Revolution), the International Fixed Calendar, and Swatch Internet Time. Kozmos is a contemporary entry in this tradition.
The Kozmos Clock
Milliday Time
The Kozmos Clock divides the day into 1,000 equal units called millidays. One milliday is equivalent to 86.4 seconds (1 minute and 26.4 seconds). Time is written as a three-digit integer with two decimal places representing centimillidays; one centimilliday 'cent' equals 0.864 seconds.
Milliday time is referenced universally to New York City (UTC−5 in standard time, UTC−4 during daylight saving time). A given milliday value corresponds to the same instant in time regardless of the observer's location.
The Solar Ring
The Kozmos Clock includes a secondary display called the Solar Ring, which divides the day into four periods calculated from local astronomical sunrise and sunset times at the user's latitude and longitude:
- Forenoon (AT) — sunrise to solar noon
- Afternoon (TP) — solar noon to sunset
- Candlelight (PF) — sunset to the midpoint of night
- Sleep (CN) — midpoint of night to sunrise
On the analog clock face the Solar Ring appears as a colored band, oriented so that the Candlelight/Sleep meeting point falls at the twelve o'clock position. Because it is derived from local solar data, the appearance of the Solar Ring varies by location even when the milliday reading is identical.
Time Zones
The Kozmos system does not use time zones. Scheduling is conducted using the universal milliday value. The Solar Ring provides local solar context independently of the time coordinate.
The Kozmos Calendar
Structure
The Kozmos Calendar divides the 365-day year into five months of 73 days each:
| Month | Days | Gregorian Equivalent |
|---|---|---|
| Februa | Days 1–73 | January 1 – March 14 |
| Maypril | Days 74–146 | March 15 – May 26 |
| Junly | Days 147–219 | May 27 – August 7 |
| Septogust | Days 220–292 | August 8 – October 19 |
| Nocember | Days 293–365 | October 20 – December 31 |
Days within each month are numbered 1 through 73. The five months are referred to as quintayears, each representing one-fifth of the solar year.
Orbital Balance Day
In leap years, the day corresponding to February 29 in the Gregorian calendar falls outside the five quintayears and is designated Orbital Balance Day, a standalone intercalary day not assigned to any month.
Date Notation
Dates are written as the month name followed by day number and the year — for example, Maypril 22nd, 2026.
See Also
References
- ^ "Kozmos Clock and Calendar". Geistown, Pennsylvania: Kozmos Clock and Calendar. Retrieved 2026.
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