A Timewalking bonus event was supposed to go live on November 29 during Dragonflight launch week. However, it was recently removed from the in-game calendar.
There will be no Timewalking event during Dragonflight launch week! There was supposed to be one starting November 29, but Blizzard removed it.
The first Timewalking event in Dragonflight is currently scheduled for January 3, 2023.