You may want to look at what various databases will do for you with
date arithmetic.
E.g., You can type this in MySQL:
select date_add('2007-01-31', interval 1 month);
I'm not sure what it will answer, but you can type that. :-)
In Postgresql, it's more like:
select '1/31/2007'::date + '1 mont
hmmm, a month period has 4*7 days e.g. then i can schedule on 31.3.07 a
month period which will repeat itself on 30.4.07 and again on 30.5.07 even
though may has 31 days. i dont see no other logic if you take a week period
it same a week has always 7 days. how else would it make sense. the start
d
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