3 ms·
This is also like the Julian Day, used in astronomy (AFAIU), which uses floating point to represent the number of days since an epoch. The fractional part presu
by wahern 4y ago
This is also like the Julian Day, used in astronomy (AFAIU), which uses floating point to represent the number of days since an epoch. The fractional part presumes 86400 "seconds" per day. Conversion between Unix Time and Julian Day is a simple, fixed function, as is conversion to proleptic Julian or Gregorian date-times. These types of schemes makes calendrical calculations, both past and future, trivial.
- cygx 4y agoNote that there are different variants of the Julian Date: For example, the Julian Date(Universal Time 1) drifts against Julian Date(Terrestrial Time), with the former being based on Earth's rotation, the latter being an idealized time scale which can be approximated by TAI + 32.184s.