Common date and datetime representation formats: Julian days, modified Julian days, unix time, decimal numbers of years and other periods. These formats can be converted to/from Dates and DateTimes.
julia> using Dates, DateFormatsCreate between datetimes and modified Julian days (MJD):
julia> mjd(60000)
2023-02-25
julia> mjd(60000.5)
2023-02-25T12:00:00
julia> mjd(Date(2000))
51544Decimal number of years:
julia> yeardecimal(Date(2020, 7, 2))
2020.5
julia> yeardecimal(2000.5)
2000-07-02T00:00:00Fractional date/time periods use *ₜ to multiply and /ₜ to divide.
julia> Minute(150) /ₜ Hour
2.5
julia> Hour(150) /ₜ Hour
150
julia> (Day(123) + Second(360)) /ₜ Hour
2952.1
julia> DateTime(2020) + 3.5 *ₜ Hour
2020-01-01T03:30:00