WWE announced the following today:

After WrestleMania, you’ll get the best of both brands – Raw and SmackDown LIVE – every month, on every pay-per-view.  Catch every event streaming live on the award-winning WWE Network.

WrestleMania 34 – April 8, 2018

WWE Backlash – May 6, 2018
    
WWE Money in the Bank – June 17, 2018
    
WWE Extreme Rules – July 15, 2018
    
SummerSlam – Aug. 19, 2018
    
WWE Hell in a Cell – Sept. 16, 2018
    
WWE TLC: Tables, Ladders & Chairs – Oct. 21, 2018
    
Survivor Series – Nov. 18, 2018
    
WWE Clash of Champions – Dec. 16, 2018