[LEAPSECS] POSIX Time (was WP7A)

[ashtongj]

Steve Allen wrote "In the time scales for TAI, LORAN-C, GPS, and
now BST the word "day" already has a meaning more clearly
communicated by "atomic day".

Is BST British Summer Time? If so, is there some new statute in the
UK adopting time offset from UTC rather than offset from the ill-defined
GMT? (Of course the offset is 0 in the winter.)

Gerry Ashton
USA