I have been pleased to learn that I can add / subtrac= t hours in org-table to shift time zones.=C2=A0 I am making tables of=C2=A0= lunar/solar parameters relevant to tides.=C2=A0 Org-table is a convenient = way to enter data in a tabular format that can be printed via LaTeX.=C2=A0 = So each year, for several time zones, I enter these times by hand.=C2=A0=C2= =A0

It's very, very easy, I have learned,= to collect all of these times (at most, maybe 12 per month) for UTC, and a= dd or subtract to generate a column of times for a new time zone.=C2=A0 Ver= y Slick!

Except that when I add, for example. 09:0= 0 to 23:33, I guess it is pretty obvious what is going to happen: it would = be the same day, but at 32:33 !!

I have tripped up= on trying to test for whether the sum is greater than or equal to 24:00, a= nd then doing something interesting with it.=C2=A0 It's actually pretty= easy to go through all the months and find the exceptions, and make manual= changes.=C2=A0 But, as I usually have done, I would rather spend a few hou= rs coming up with some programmatic method for making this work automatical= ly!=C2=A0=C2=A0

The other problem is the chan= ge of the day.=C2=A0 I suppose I could use 0, 1, 2... for Sunday, Monday, T= uesday...=C2=A0 (I am living in the United States).=C2=A0
Has someone solved this problem?

Than= k you,

Alan Davis

-- <= br>
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 "This ig= norance about the limits of the earth's ability to absorb
=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 pollutants should be reason enough for caution = in the release
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 of polluting substan= ces."
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0=C2=A0 ---Meadows et al.=C2=A0=C2=A0 1972.= =C2=A0 Limits to Growth. =C2=A0=C2=A0 =C2=A0 (p. 81)=C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0
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