Anthony added the comment:
> Yes, i mean line 305.
> 
> I'm not sure but may be it introduced by changeset 4994:fe140bc0eaa9

Not in my mercurial working copy.
I cloned it from sourceforge last week. Here I've this::

   Mercurial
   changeset 4986:fe140bc0eaa9

   Implement (and document) timezone offsets
   author 	Ralf Schlatterbeck <rsc@runtux.com>
   date 	Tue, 21 Apr 2015 17:33:06 +0200 (10 months ago)
   parents 	07c59221f363
   children 	f47341cbe3c8
   files 	roundup/date.py

and the line 305 in that file was not touched by this changeset. 

pf@pfmaster-P170EM:pts/28 ~/roundup 93> sha256sum roundup/date.py
b1b72ec5ceff6077dde0ce94b34c7c2009f5d564b6a75a0f7339308d098dba62 
roundup/date.py

This should be the head (tip) of the official Roundup source, or not?

Best regards, Peter