Next week I think:

"Tomorrow's maintenance will not include a new patch. That said, we are still aiming to release Update 4 next week, which will include some significant updates and additions."- @ZOS_GinaBruno

http://forums.elderscrollsonline.com/discussion/comment/1259354#Comment_1259354

Written today:

ZOS_GinaBruno wrote: »

Tomorrow's maintenance will not include a new patch. That said, we are still aiming to release Update 4 next week, which will include some significant updates and additions.