Re: get date - 1 day

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"Dr J R Stockton" <jrs@xxxxxxxxxxxxxxxxxx> wrote in message
news:Wa17TNWqfqaHFw08@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
In microsoft.public.scripting.vbscript message <OA7VMGpQIHA.1188@TK2MSFT
NGP04.phx.gbl>, Wed, 19 Dec 2007 23:50:25, "Pegasus (MVP)"
<I.can@xxxxxxx> posted:
"Hassan" <hassan@xxxxxxxx> wrote in message
news:emUaGwoQIHA.280@xxxxxxxxxxxxxxxxxxxxxxx
How can i get the value of the date i.e. one day minus todays date

Doing date arithmetic in a batch file is cumbersome
because you have to write your own routines to
calculate the number of days since an artifical start
date, e.g. 1 January 1970.

That's not quite true. Read alt.msdos.batch.nt to find how it has
already been done; or ask there. Also, stepping Y M D back one day at a
time, or N days, is not unduly difficult.


I am fully aware of the methods and I have tried them myself.
They involve formulae like these to calculate Julian dates:

if %m% LSS 3 set /a m=%m%+12 & set /a y=%y%-1
set /a z=-719560+ %d% + (153 * %m%-2) / 5 + 365 * %y% + %y% / 4 - %y% / 100
+ y / 400

In my book this is a little more involved than writing

DateAdd("d", -1, Date())


.

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