Nightfall/Weekly for HoW release (Destiny)
Looks like the Nightfall and Weekly will not be available on the 19h until House of Wolves officially goes live.
https://www.bungie.net/en/Forum/Post/120220099/0/0/1
During the eight hours between the weekly reset and the patch download associated with the release of House of Wolves there will be no weekly, Nightfall, or daily activities available. We apologize for any inconvenience this may cause.
So it looks like all you weekly reseters can take the night off--or concentrate just on the raids. I take this to mean that all three activities will be House of Wolves releated. However, maybe not--I also remember that the Weekly Heroic and Nightfall are also supposed to now be different so at least one of them has to not be the new Strike.
Nightfall/Weekly for HoW release
by stabbim 
, Des Moines, IA, USA, Tuesday, May 12, 2015, 01:29 (3729 days ago) @ CougRon
So it looks like all you weekly reseters can take the night off--or concentrate just on the raids. I take this to mean that all three activities will be House of Wolves releated. However, maybe not--I also remember that the Weekly Heroic and Nightfall are also supposed to now be different so at least one of them has to not be the new Strike.
Maybe, depending on when folks are playing. 8 hours after the weekly reset is still in the middle of the workday for most of us in the US. For me that's still 4-5 hours before I'm done with work. I doubt my schedule will be any different for it.