Re: Getting GMT time

Stefaan wrote:
I use following algoritm to determine the GMT time to calculate planet positions
[snip] 
## Following command will convert the local time t to GMT time

clock scan [clock format $t -format "%Y-%m-%d %H:%M:%S" -gmt 1]
1136022869


That is just plain wrong.

Whatever you might believe, [clock seconds] returns the number of
nominal seconds since 00:00 UTC, 1 January 1970.  There is no such
thing as "local seconds" in Tcl.  All time zone conversion happens
inside [clock scan] and [clock format].  If [clock seconds] reports
time in the local time zone and not UTC, that is a bug.  (Nobody
has reported such a bug - and since I'm the mainainer of [clock],
I'd surely know if anyone had.)


--
73 de ke9tv/2, Kevin
.

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