Re: Night Time Images
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From: Martin G. <gim...@gi...> - 2002-08-13 09:31:02
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"Jake Ortman" <ja...@or...> writes:
>>Yes, change the test so that it's correct for your timezone. Use
>>
>> if (($regs[2] > 1) && ($regs[2] < 13)) {
>> $night = 1;
>> }
>
> That didn't work. It's 11:30 am pacific time right now, and there's
> a moon graphic on the site :-).
Hmm, that's odd. Let me try and explain how I came up with '> 1' and
'< 13'. The Pacific Time Zone is UTC - 7 hours because of Daylight
Saving Time, correct me if I'm wrong, I've got my information from
this page:
http://www.timetemperature.com/tzus/oregon_time_zone.shtml
So a timeline would look like this:
PDT: 00 ~~~~~~ 06 ------ 12 ------ 18 ~~~~~~ 24
where the ~ marks the hours that belong to the night. The
corresponding UTC timezone is:
UTC: 07 ~~~~~~ 13 ------ 19 ------ 01 ~~~~~~ 07
So, this means that it's night at your place when the hour is between
7 and 13 UTC or 1 and 7 UTC, i.e., from 1 to 13 UTC. So unless someone
can find an error in the above calculations, then I cannot understand
why it doesn't work for you...
--
Martin Geisler My GnuPG Key: 0xF7F6B57B
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