[Tutor] How do you manipulate dates? ie. one month before 1/1/2001 = ??

[Danny Yoo]

On Thu, 28 Jun 2001, Dan Tropp wrote:

> The time module allows you to print, format and create time tuples and epoch
> time, but how do you calculate the date in two days, or three months ago
> (including rolling the months and accounting for daylight savings time??
> 
> utc time - 60*60*24*numDays does not work for daylightsavings changes.
> 
> I guess I'm looking for something like java.util.Calendar.add(DAY_OF_MONTH,
> numDays)

It looks like the mxDateTime module might be what you're looking for.  In
the example on:

    http://www.lemburg.com/files/python/mxDateTime.html

the author does examples like this:

###
# add one month
>>> print now() + RelativeDateTime(months=+1)
1998-09-11 16:46:24.59

# Last Sunday in October 1998
>>> print Date(1998) + RelativeDateTime(weekday=(Sunday,-1),month=10)
1998-10-25 00:00:00.00
###

so mxDateTime makes it easy to add and subtract dates from each
other.

Good luck to you!