Enum Epoch 

pub enum Epoch {
    JulianPeriod,
    JulianCalendar,
    GregorianCalendar,
    J1900_0,
    E1900_0,
    Unix,
    TimeStandard,
    J1991_25,
    Y2k,
    J2000_0,
    J2100_0,
    J2200_0,
}

A reference for a well known Instant in time, used for offsetting events from.

Variants

JulianPeriod

The start of the Julian Period, which is 4713 BCE on Jan 1st Julian, 00:00:00.0 Specified in TT (in accordance with the International Astronomical Union since 1997)

JulianCalendar

The start of the Julian Calendar period, which is January 1st, CE 1, 00:00:00.0 in the Julian calendar. Specified in TT Note that this is exactly two days prior to the Gregorian Epoch.

Not to be confused with the JulianPeriodEpoch which is much earlier.

GregorianCalendar

The start of the Gregorian Calendar period, which is January 1st, CE 1, 00:00:00.0 in the Gregorian calendar. Specified in TT

J1900_0

The J1900.0 astronomical epoch, which is December 31, 1899 CE gregorian, 12:00:00.0 Specified in TT

E1900_0

The 1900.0 astronomical epoch which is January 1st, 1900 CE gregorian, 00:00:00.0 Specified in TT

Unix

The UNIX Epoch, which is January 1st, 1970 CE gregorian, 00:00:00.0 Specified in UTC

TimeStandard

The Time Standard Epoch where TT, TCB, and TCG all read the same. which is January 1st, 1977 CE gregorian, 00:00:32.184 Specified in TT, TCB and TCG, where they align

J1991_25

The J1991.25 astronomical epoch, which is April 2, 1991 CE gregorian, 13:30:00.0 Specified in TT

Y2k

The Year 2000 which is January 1st, 2000 CE gregorian, 00:00:00.0 Specified in UTC

J2000_0

The J2000.0 astronomical epoch, which is January 1, 2000 CE gregorian, 12:00:00.0 Specified in TT

J2100_0

The J2100.0 astronomical epoch, which is January 1, 2100 CE gregorian, 12:00:00.0 Specified in TT

J2200_0

The J2200.0 astronomical epoch, which is January 2, 2200 CE gregorian, 12:00:00.0 Specified in TT

Implementations

impl Epoch

pub const fn as_instant(&self) -> Instant

Generate the Instant that this Epoch refers to