Patch 1.17a was released at the following time.

* Clients will update automatically upon launch after release of the patch.

[Date & Time]
Apr. 25, 2011 at 2:00 p.m. to 5:00 p.m. (PDT)

[Affected Service]
- FINAL FANTASY XIV

* You can view comprehensive patch notes by visiting the link below:
http://forum.square-enix.com/ffxiv/threads/8426