Universal Stardate Converter
Current version: 0.8001 (2015-12-31)
Gregorian | |
Julian date: | |
Modified Julian date: | |
Ordinal Date: |
Out-of-universe equivalent dates
TrekGuide: |
Star Trek Online dates
Hynes: | |
STO Academy: | |
Major Tom: | |
Anthodev: |
Hybrid systems
Main: | |
Kennedy (current): |
The Next Generation
TrekGuide: | |
TrekGuide (old): | |
Schmidt: | |
Pugh: | |
Pugh (fixed year): | |
JohnCAldrich: | |
Red Dragon Inn: |
Original Series
TrekGuide: |
Descriptions:
Real-world dating systems: Self-explanatory.
Changelog:
0.8001 (2015-12-31):
First public revision
Known issues:
Real-world dating systems: Self-explanatory.
- Gregorian: The calendar we all know and ... recognise. The time is assumed to be UTC.
- Julian date: A day count used by astronomers, beginning at noon GMT of 1 January 4713 BCE (Julian calendar). It was this day count that inspired the creation of the stardate.
- Modified Julian date: The Julian date, minus 2400000.5. This gives five-digit values in the present era, so one can pass it off as a stardate more easily than the Julian date.
- Ordinal date: Year and day of year, in the Gregorian calendar. The reboot stardates are created by simply putting these together with a period in between. The leading zeroes are presumed to be an error.
- TrekGuide: Based on a constant rate of increase of 1000 units every 365.25 days, the base date is midnight 1987-07-15 which corresponds to 41000.0.
- Hynes: Based on a rate of increase of 1000 units per Gregorian calendar year, with midnight on 1922-05-25 corresponding to 0.00, and stardates increasing at a linear rate betweenNew Year's Days. In other words, every year starts at xx605.479.
- STO Academy: 1 day = 2.736 units, midnight UTC 2010-05-24 corresponds to 87998.3079 exactly. Not very precise. Note that the times have been converted to UTC assuming that the original converter works in Pacific Time; based on the DST behaviour it is certainly located in the USA.
- Major Tom: 1 day = 2.7378508 stardate units, base date 1922-05-25.
- Anthodev: 1000 stardate units = 365.2527 days, base date 1922-05-25.
- Main: The most convoluted system, it introduces the "issue number" in order to reconcile the different rates of TOS and TNG. I'll point you to his FAQ for the details. This system is used by Google Calendar to generate stardates.
- Kennedy: Another system in the vein of Main's, but this one attempts to create stardates while having only one continually increasing number. See his site for details.
- Schmidt: Based on Gregorian calendar years, with midnight on New Year's Day 2323 corresponding to 0.00, stardates always being a multiple of 1000 at the start of a year, and increasing at a linear rate between New Year's Days. Also used by Graham Kennedy's converter for the Daystrom Institute Technical Library.
- Pugh: Based on Gregorian calendar years; the only difference between Pugh v1 and Schmidt is that for some reason, when considering negative stardates the suffix showing the portion of the year elapsed runs in the wrong direction, so -309999.99 is followed by -308000.00, for example. Why Pugh made this decision is a mystery.
- Pugh (fixed-rate): 1000 units = 365.2425 days, same base date. This covers arbitrary dates, unlike Pugh's original converter which only covers 2323-2423 (0.00-101000.00).
- TrekGuide v1: 1000 units = 365.2422 days, base date 2322-05-25. This was superseded in 2011 with the current version.
- TrekGuide v2: 1 stardate unit = 34367.0564 seconds (or 918.23186 units = 365.2422 days), base date 2318-07-05 at noon. This is the current version available on TrekGuide's site. Note the significantly slower rate of increase.
- TrekGuide TOS: Based on a constant rate of increase of 2635.10833 units every 365.2422 days base date 2265-04-25.
Changelog:
0.8001 (2015-12-31):
- Fixed a typo
- Added licensing information to JavaScript file
First public revision
Known issues:
- Various rounding issues