Re^3: Convert dates with Time::Local

I don't think I'd use timegm with a Julian date.

Jan 1st 1970 has a Julian date of 2440587. Surely you can just subtract that from the Julian date you have and then multiply by the number of seconds in a day to get the number of seconds since the epoch. This, of course, assumes that your computer uses 1970-01-01 00:00:00 as its epoch.

--
<http://dave.org.uk>

"The first rule of Perl club is you do not talk about Perl club."
-- Chip Salzenberg

Comment on Re^3: Convert dates with Time::Local

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Re^4: Convert dates with Time::Local by duff (Parson) on Feb 13, 2006 at 16:47 UTC
Julian dates and julian days are different things. The latter is just the number of days since the start of the year. Jan 1 is julian day 1, Feb 1 is julian day 32, Feb 2, day 33, and so on. duff	[reply]
Re^5: Convert dates with Time::Local by davorg (Chancellor) on Feb 13, 2006 at 16:59 UTC
Julian days and Julian dates are subtley different things as the Wikipedia article indicates. But Julian day doesn't mean what you think it means. Granted, it's quite a common error. But it's still an error :) -- <http://dave.org.uk> "The first rule of Perl club is you do not talk about Perl club." -- Chip Salzenberg	[reply]
Re^6: Convert dates with Time::Local by duff (Parson) on Feb 13, 2006 at 17:15 UTC
Julian day doesn't mean what you think it means Sure it does. You don't think wikipedia the authoritative source of all knowledge do you? There's not a one-to-one correspondence between names and concepts. Sometimes a name is used for multiple (sometimes incompatible or even unrelated) concepts. This is one of those times. In any case, I'm fairly sure that jeanluca and I are talking about the same thing :) duff	[reply]