227.015 (

A Modern Datetime Format
12017 - 227.015 (Earth+0)

12017 - Year based on the Holocene Era numbering system.

227 - Day of the year. This year has days.

.015 - Decimal time system where a day is equal to 1.

(Earth - Celestial body of time observation.

+0) - Timezone offset using decimal time.


- Simpler and concise, resulting in fewer errors.

- Makes ancient historical dates easier to work with.

- Supports multi-planetary timekeeping.

Universal Rules

- Year zero (0) is to be defined as when the first Holocene Era item contacts the celestial body's surface.

- A year is to be defined as the number of complete orbits around the primary star, resetting at the closest point of the orbit.

- A day is to be defined by a complete rotation bringing the primary star to directly above the same longitude, so that noon is 0.5.

Planetary Rules

For each planet, the following timekeeping rules must be defined:

1) The primary star.

2) The zero longitude.

3) Rules for handling disparity between rotations and orbits (leap years).


1) Sol ("The sun").

2) International Reference Meridian (Near Greenwich, UK).

3.a) If the year is divisible by four (4) then the year shall have 366 days.

3.b) If the year is divisible by 128, than the year shall have 365 days.


1) Sol ("The sun").

2) Airy-0 crater.

3) If the year is divisible by two (2) or five (5) then the year shall have 669 days.