The Saints game will kick off at 3:15pm on Saturday September 21st, the Chiefs game at 2pm on Sunday October 6th.
Also featuring in the first batch of Aviva Premiership fixtures are away trips to Saracens on Sunday September 15th (to be broadcast live on BT Sport, kick off 2pm) and Newcastle Falcons (Sunday September 29th, kick off 3pm).
Also of note in this first draft of fixtures is the away fixture at London Wasps in April. This game is penciled in as Wasps' St George's Day Game, and is scheduled to be played at Twickenham.
A full list of fixtures can be viewed on the Premiership Rugby website.