From the official NHL release:

EASTERN CONFERENCE

Date TIME (ET) #2 Tampa Bay vs. #4 NY Islanders

Wednesday, April 27 7 p.m. NY Islanders at Tampa Bay NBCSN, CBC, TVA Sports

Saturday, April 30 3 p.m. NY Islanders at Tampa Bay NBC, TVA Sports

Tuesday, May 3 7 p.m. Tampa Bay at NY Islanders NBCSN, TVA Sports

Friday, May 6 7 p.m. Tampa Bay at NY Islanders NBCSN, TVA Sports

*Sunday, May 8 TBD NY Islanders at Tampa Bay TBD

*Tuesday, May 10 TBD Tampa Bay at NY Islanders TBD

*Thursday, May 12 TBD NY Islanders at Tampa Bay TBD

Date TIME (ET) #1 Washington vs. #2 Pittsburgh

Thursday, April 28 8 p.m. Pittsburgh at Washington NBCSN, TVA Sports

Saturday, April 30 8 p.m. Pittsburgh at Washington NBC, TVA Sports

Monday, May 2 8 p.m. Washington at Pittsburgh NBCSN, TVA Sports

Wednesday, May 4 8 p.m. Washington at Pittsburgh NBCSN, TVA Sports

*Saturday, May 7 TBD Pittsburgh at Washington TBD

*Tuesday, May 10 TBD Washington at Pittsburgh TBD

*Thursday, May 12 TBD Pittsburgh at Washington TBD

WESTERN CONFERENCE

Date TIME (ET) #1 Dallas vs. #2 St. Louis

Friday, April 29 8 p.m. St. Louis at Dallas NBCSN, TVA Sports

Sunday, May 1 3 p.m. St. Louis at Dallas NBC, TVA Sports

Tuesday, May 3 9:30 p.m. Dallas at St. Louis NBCSN, TVA Sports

Thursday, May 5 8 p.m. Dallas at St. Louis NBCSN, TVA Sports

*Saturday, May 7 TBD St. Louis at Dallas TBD

*Monday, May 9 TBD Dallas at St. Louis TBD

*Wednesday, May 11 TBD St. Louis at Dallas TBD

Date TIME (ET) #3 San Jose vs. #4 Nashville

Friday, April 29 10:30 p.m. Nashville at San Jose NBCSN, TVA Sports

Sunday, May 1 8 p.m. Nashville at San Jose NBCSN, TVA Sports

Tuesday, May 3 9 p.m. San Jose at Nashville USA, TVA Sports

Thursday, May 5 9 p.m. San Jose at Nashville CNBC, TVA Sports

*Saturday, May 7 TBD Nashville at San Jose TBD

*Monday, May 9 TBD San Jose at Nashville TBD

*Thursday, May 12 TBD Nashville at San Jose TBD

* if necessary TBD – To Be Determined