4 ms·
Can we go back to calling it GMT as well?
by gadders 8y ago
Can we go back to calling it GMT as well?
- dijit 8y agoUTC and GMT are similar but not the same. GMT does not observe leap seconds for instance.
- gadders 8y agoTIL GMT != UTC
- welterde 8y agoUTC only has leap seconds to keep within 0.9s of UT1, which is the mean solar time at 0° longitude (based on Quasar measurements). GMT is essentially equivalent to UT1 (and in modern usage either means UTC or UT1). UT1 essentially doesn't need leap seconds, because it is the correct mean solar time and not an 1Hz approximation of it (which UTC pretty much is).
- Faaak 8y agoGMT and UTC are not semantically the same though. In this case UTC makes more sense as it doesn't depends on Greenwich time. GMT should be defined by UTC, but not the other way around