You're both wrong, really. We have 1-19 March overall, but there will be a "Stage 2" of the selection process a week or so in after which full servers are completely out of the question. So the actual time to choose your server can be up to 18-19 days (too lazy to find the hours) depending on the population of the destination server.
Selecting a Transfer Destination
During the transfer selection period indicated below, players will be able to select a destination World on the World Transfer Application Page. Players who do not select a destination World during this period will be automatically distributed across the Worlds.
* The World Transfer Application Page is scheduled to be available from March 1.
Transfer destination selection period: From 0:00 a.m. PST, March 1 (Thursday) to 0:59 a.m. PDT, March 19 (Monday), 2012.
* Transfer selection period will consist of a first and second stage.
First Stage: From 0:00 a.m. PST, March 1 (Thursday) to 0:59 a.m. PDT, March 12 (Monday), 2012.
- Players will still be able to change their destinations, even after making a selection.
* Players will not be able to select Worlds that have already been filled. Players can, however, move from Worlds that have been filled to other Worlds.
Second Stage: From 1:00 a.m. PDT, March 12 (Monday) to 0:59 PDT, March 19 (Monday), 2012.
- Worlds that have been filled will be locked, and players in these Worlds will not be able to transfer to other Worlds.