FYI made a change to the Wiki
I changed this language (relevant text is bolded):
The new ticket must complete travel within 1 year of the original ticket's purchase date
To this:
The new ticket must be purchased within 1 year of the original ticket's purchase date
I just changed a ticket issued in March, 2014 to a flight in April of 2015, in case anyone wants to quarrel with this. As far as I know, this is the way it's always been, at least on Continental.