There is a solution for you, I found this usefull for my research with similar things: http://docs.python.org/library/datetime.html
look at timedelta object -- Kuba -- You received this message because you are subscribed to the Google Groups "web2py-users" group. To post to this group, send email to web...@googlegroups.com. To unsubscribe from this group, send email to web2py+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/web2py?hl=en.