Time.strftime and UTC

[Michael C. Libby]

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Hi, just wondering if I'm missing something...

mcl@saluki:~$ ruby -v
ruby 1.8.2 (2004-11-06) [i686-linux]
mcl@saluki:~$ ruby -e 'puts Time.new.utc.strftime("%H:%M %Z")'
04:31 GMT

If I say to convert to UTC, shouldn't I get %Z =3D "UTC"?

It also contradicts page 649 of Pickaxe2 which says that 1.8+
would have UTC instead of GMT anyway.

Thanks.



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( Michael C. Libby | www.andsoforth.com | 2005-01-19 04:31 UTC )

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[Yukihiro Matsumoto]

Hi,

In message "Re: Time.strftime and UTC"

|mcl@saluki:~$ ruby -e 'puts Time.new.utc.strftime("%H:%M %Z")'
|04:31 GMT
|
|If I say to convert to UTC, shouldn't I get %Z = "UTC"?
|
|It also contradicts page 649 of Pickaxe2 which says that 1.8+
|would have UTC instead of GMT anyway.

Unlike inspect or to_s, strftime honors underlying strftime(3)
function on the platform. This means strftime(3) function on your
platform returns GMT for %Z for time on UTC zone. I'm not sure this
situation could be fixed, since it requires either

* abandon strftime(3) and re-implement the whole time formatting
function.

* or seek for the format string and replace %Z to UTC if a time is
in the UTC zone.

which cost us much anyway.

matz.