This mail was in my Inbox today and I was puzzled at first:
When I tried to start Zope it returned an error:
DateError: Invalid date: (2022, 2, 29)
Apparently it only happend on a leap year and exactly on the 29th of
February. Checking the old code base (Python 2.4, Plone 3) revealed this:
DateTime.DateTime( DateTime.DateTime().year() + 10, DateTime.DateTime().month(), DateTime.DateTime().day())
*Doh!*. Python provides a timedelta (Python 2.4 Library reference) module which would be better for calculating future dates.