8 Feb
2005
8 Feb
'05
2:20 a.m.
In article
As I understand it, TAI and UTC can both be described in terms of a clock counting SI seconds. The difference is that a TAI day is always 86400 seconds long, whereas a UTC day can be 86399 - 86401 seconds, depending on which second it is.
Yes.
Using TAI, we can always convert a date and clock time to a count of seconds and vice-versa without any additional information. To do the same with UTC, we need a table of leap-seconds.
No. Date and clock times are usually UTC or some offset (time-zone) thereof. Converting to TAI requires a table of leap-seconds. -- Ashley Yakeley, Seattle WA