[REBOL] Re: add/subtract with date!
From: t_degrav:rhrk:uni-kl at: 14-Nov-2000 19:00
Hi Russel,
maybe I have the explanation:
When you think of date as having the three components day, month and year
you don't directly change the whole date with "today/month: now/month + 15"
but only the month! So you get 14-26-2000, which means more or less the
14th day of the 26 month(!) of the year 2000. Rebol recognizes that this
isn't a valid date, but is able to calculate a corresponding date: 14-2-2002.
If you now repeat "today/month: now/month + 15" you first get 14-26-2002.
This is then transformed to 14-2-2004. Maybe you confused yourself a little
by mixing today and now? Try today/month: today/month + 15, then you get
the result you possibly expected, the date increases exactly 15 months.
This maybe confusing at first but comes in rather handy when you want to
add a certain amount of months instead of days. The only thing I miss is
the automatic conversion of negative month values to preceding years.
Tom
Russell Yost wrote:
