Since you are working with date fields, just do the time timedelta directly.
I don't know where the None comes from, but why bother with strptime? /dps -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/web2py/d1de6874-6672-46b7-9072-24da0a319911%40googlegroups.com.

