Sunset, sunrise, twilight calculations in LC?

[Kay C Lan]

Nope, but this will help you calculate the Julian Date Number, which
you'll need:

   put the date into tDate
   convert tDate from date to dateItems
   if  ((item 2 of tDate = 1) or (item 2 of tDate = 2)) then
      put 1 into tDay
   else
      put 0 into tDay
   end if
   put item 1 of tDate + 4800 - tDay into tYear
   put item 2 of tDate + (12 * tDay) - 3 into tMonth
   put item 3 of tDate + \
         ((153 * tMonth + 2) div 5) + \
         (365 * tYear) + \
         (tYear div 4) - \
         (tYear div 100) + \
         (tYear div 400) - \
         32045 into tJDN

On Sat, Aug 23, 2014 at 7:46 AM, Charles E Buchwald <charles at buchwald.ca> wrote:
> Hi List People,
> Does anyone know of an LC version of sunrise/sunset and twilight calculations?
> I found a couple of web based APIs, but I'd like it to work offline.
> I found this: http://en.wikipedia.org/wiki/Sunrise_equation ... but it's going to take me a while to translate that into LC, which is why I'm asking.
> - Charles
>
> --
> Charles E. Buchwald
> CEO/Director General
> Museografica Digital
> http://digital.museografica.com
>
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>
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