Fundamental time functions

  utc2tai   - UTC 58 to TAI 58, adds NIST leap seconds
  tai2utc   - TAI 58 to UTC 58, subtracts NIST leap seconds

  airs2tai  - AIRS TAI 93 to TAI 58, direct conversion
  tai2airs  - TAI 58 to AIRS TAI 93, direct conversion

  iet2tai   - IET 58 to TAI 58, direct conversion
  tai2iet   - TAI 58 to IET 58, direct conversion

Matlab datenum functions

  utc2dnum  - UTC 58 to Matlab date numbers, direct conversion
  dnum2utc  - Matlab date numbers to UTC 58, direct conversion

  tai2dnum  - TAI 58 to Matlab date numbers, calls tai2utc
  dnum2tai  - Matlab date numbers to TAI 58, calls utc2tai

  airs2dnum - AIRS TAI 93 to Matlab date numbers, calls tai2dnum
  dnum2airs - Matlab date numbers to AIRS TAI 93, calls dnum2tai

  iet2dnum  - IET to Matlab date numbers, calls tai2dnum
  dnum2iet  - Matlab date numbers to IET, calls dnum2tai

Matlab datetime functione

  dtime2tai - Matlab datetime to TAI 58, calls dnum2utc, utc2tai
  tai2dtime - TAI 58 to Matlab datetime, calls tai2utc, utc2dnum

Time units

  TAI 58, seconds since 1 jan 1958 including leap seconds
  TAI 93, seconds since 1 jan 1993 including leap seconds
  IET 58, microseconds since 1 jan 1958 including leap seconds
  UTC 58, seconds since 1 jan 1958 assuming 86400 seconds/day
  Matlab date numbers, days from year 0 with fractional days
  Matlab datetime structs, UTC-style time objects