A Modern Datetime Format
12020 : 339.788 (Earth+0)

12020 : - Current year based on the Holocene Era calendar system

339 - Current day of the year (This year has days)

.788 - Current time of day using fractional time

(Earth - Celestial body of observation

+0) - Timezone offset using fractional time (London)


- Using the Holocene calandar makes working with ancient historical dates easier. Please see https://en.wikipedia.org/wiki/Holocene_calendar for more information.

- Omitting the month saves space and removes potential confusion. Months serve little purpose in todays world and can easily be replaced by more standardised counting systems. If a period of time similar to a month is required, such as for accounting reasons, then thirteen periods of 28 days (4 weeks) should be adopted with the final month having 29 days (30 days on leap years).

- Decimal time allows the one or more digits to be used to represent the day using a fraction over one, where one is a full day. Using this system, .5 would be noon, and .25 would be 06:00. Three decimal points will provide accuracy of 1 minute and 24.6 seconds, which is more than suitable for most activities. Adding digits will provide further precision.

- Identifying the celestial body supports multi-planetary timekeeping. Note that the rules for timekeeping need to be detirmined and agreed for each celestial body.

- Showing the timezone offset, using a plus/minus and fractional time allows a difference in time between locations to be easily recognised and calculated.

Rules & Notes

1. Unless otherwise agreed, year zero (0) is to be defined as when the first Holocene Era item contacts the celestial body's surface.

2. Unless otherwise agreed, a year is to be defined as the number of complete orbits around the primary star, resetting at the closest point of the orbit.

3. Unless otherwise agreed, a day is to be defined by a complete rotation bringing the primary star to directly above the same longitude, so that noon is .5.

4. The first year and first day of the year is to be zero.

5. For each celestial body, the following timekeeping rules must be agreed:

a) The primary star.

b) The zero longitude.

c) Start of orbit.

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

6. If a time period similar to months are required, then a repeating period of 28 days is to be used as "months". When designating months by number the first month will be period one. Any remainder days of 14 or less will be added to the final month of the year. The names of the months shall be:
> January
> February
> March
> April
> May
> June
> July
> August
> Sextilis
> September
> October
> November
> December