If you are referring to Round two of the 2013 NHL playoffs, they will start when all of the teams finish their first rounds. The round two schedule is now listed as follows for ET:
Wednesday, May 15th, 2013: Red Wings at Blackhawks 8PM
Saturday, May 18th, 2013: Red Wings at Blackhawks 1PM
Monday, May 20th, 2013: Blackhawks at Red Wings 7:30 PM
Thursday, May 23rd, 2013: Blackhawks at Red Wings 8PM
If needed... Saturday, May 25th, 2013: Red Wings at Blackhawks
If needed... Monday, May 27th, 2013: Blackhawks at Red Wings
If needed... Wednesday, May 29th, 2013: Red Wings at Blackhawks
Tuesday, May 14th, 2013: Sharks at Kings 10PM
Thursday, May 16th, 2013: Sharks at Kings 10PM
Saturday, May 18th, 2013: Kings at Sharks 9PM
Tuesday, May 21st, 2013: Kings at Sharks 10PM
If needed... Thursday, May 23rd, 2013: Sharks at Kings 10:30PM
If needed... Sunday, May 26th, 2013: Kings at Sharks
If needed... Tuesday, May 28th, 2013: Sharks at Kings
Tuesday, May 14th, 2013: Senators at Penguins 7:30PM
Friday, May 17th, 2013: Senators at Penguins 7:30PM
Sunday, May 19th, 2013: Penguins at Senators 7:30PM
Wednesday, May 22nd, 2013: Penguins at Senators 7:30PM
If needed... Friday, May 24th, 2013:Senators at Penguins7:30PM
If needed... Sunday, May 26th, 2013: Penguins at Senators
If needed... Tuesday, May 28th, 2013:Senators at Penguins
Thursday, May 16th, 2013: Rangers at Bruins 7:30PM
Sunday, May 19th, 2013: Rangers at Bruins 3:00PM
Tuesday, May 21st, 2013: Bruins at Rangers 7:30PM
Thursday, May 23rd, 2013: Bruins at Rangers 7:00PM
If needed... Saturday, May 25th, 2013: Rangers at Bruins
If needed... Monday, May 27th, 2013: Bruins at Rangers
If needed... Wednesday, May 29th, 2013: Rangers at Bruins