| A Proposal for Earth Decimal Time | Version | 1.4 | Last Modified at |
0.244379 | Earth Decimal Time (EaDT) |
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| Copyright (c) 2007, Richard L. Mitchell | ||||||||||||||||
| Mean Solar Year = | 365.2421934 | |||||||||||||||
| Much like current time except no dividing by 12. Also years exactly track the Sun and months exactly track the Moon. |
Start of 2007 = |
39162.005 | ||||||||||||||
| Current Method of Time Measurement | Decimal Time | Nickname | Decimal to Current | |||||||||||||
| Year | Starts January 1 | Year | Starts at vernal equinox, divisions are determined by mean solar year | Same as solar year | ||||||||||||
| Deciyear | One tenth of a year based on mean solar year | 1.2 | months | |||||||||||||
| Month | Starts January 1, variable number of days |
Month | Starts at first new Moon closest to the vernal equinox | Same as lunar month | ||||||||||||
| Centiyear | One hundreth of a year | 3.652421934 | days | |||||||||||||
| Day | Day | First day of month starts as above, second day starts one Earth rotation later | Same | |||||||||||||
| Milliyear | Mil | One thousandth of a year | 8.765812642 | hours | ||||||||||||
| Hour | One-twentyfourth of a day | |||||||||||||||
| Decimilliyear1 | Demil | One ten-thousandth of a year | 0.876581264 | hours | ||||||||||||
| Centimilliyear1 | Cemil | One hundred-thousandth of a year | 5.259487585 | minutes | ||||||||||||
| Minute | One sixtieth of an hour | |||||||||||||||
| Microyear | Mic | One millioneth of a year | 31.55692551 | seconds | ||||||||||||
| Decimicroyear1 | Demic | One ten-milloneth of a year | 3.155692551 | seconds | ||||||||||||
| Second | One sixtieth of a minute | |||||||||||||||
| Centimicroyear1 | Cemic | One hundred-millionth of a year | 0.315569255 | seconds | ||||||||||||
| Time would be stated as x.xxxxxx if down to the microyear. | ||||||||||||||||
| Time at the end of the year might reset before reaching .999999 if the year is shorter than the Mean Solar Year. | ||||||||||||||||
| If the year is longer than the Mean Solar Year, time would be stated as y+.yyyyyy where y is the next year and .yyyyyy is the factor over. | ||||||||||||||||
| There would still be 12 months in the year of 29.5 days each. | ||||||||||||||||
| The first month of the year could start up to 14.25 days prior to the vernal equinox and up to 14.25 days after. | ||||||||||||||||
| The day at the end of the month would normally straddle the month line i.e. be at the end of the previous month and at the beginning of the next month. | ||||||||||||||||
| Time would be the same all over the Earth. | ||||||||||||||||
| 1 Combining decimal references is normally not considered acceptable. In fact there is movement for getting rid of Deci and Centi since they are not 10-3 references. I believe we need these degradations though. I proposed some nicknames. | ||||||||||||||||