4 Feb
2005
4 Feb
'05
6:45 a.m.
Ashley Yakeley
So UTC and UT1 seem to be more-or-less equivalent, in that they both include leap seconds.
Well, they don't drift apart if that's what you mean. There are no leap seconds in UT1, instead UT1 seconds are of variable length.
Isn't UTC prior to the epoch defined as UT1? I seem to remember reading this, but couldn't find the reference atm. -kzm -- If I haven't seen further, it is by standing in the footprints of giants