NEW YORK -- A timeline of events since the NHL and the NHL Players' Association began negotiations on a new collective bargaining agreement.
June 29 -- NHL and NHL Players' Association open negotiations with 2½ hour meeting in New York.
July 5-6 -- Two days of negotiations in New York. NHL deputy commissioner Bill Daly termed the meetings as productive.
July 13 -- In initial offer, NHL asks players to accept a reduction in hockey-related revenue from 57 percent to 46 percent. The NHLPA maintains that the mathematics involved means the final number is closer to 43 percent.
July 18 -- Labor talks resume for more than two hours at NHL office in New York. The union still hasn't presented a counteroffer.
July 24-26 -- NHL presents "the vast bulk" of its proposals at league office in Toronto, marking the fifth straight week that the sides have met.
Aug. 9 -- Union head Donald Fehr rejoins negotiations in New York after a trip to Europe to meet with players. NHL commissioner Gary Bettman says a "wide gap" still exists between the sides. Fehr referred to the split as "a meaningful gulf."
Aug. 10 -- NHL and players' association meet for three hours at league office in New York. Both sides express optimism that season could start on time.
Aug. 14 -- During negotiations in Toronto, players make first offer. The proposal includes a smaller percentage of revenues for players and an expanded revenue-sharing program to help struggling teams. The offer separates the salary cap from hockey-related revenue and sets a fixed rate -- increasing by two percent for the first year, four percent for the second and six percent for the third. That would increase the salary cap to $78.93 million for the 2014-15 season. After that, players would hold an option to have the fourth year revert to the current system, in which they are entitled to 57 percent of all revenues.
Aug. 15 -- NHL rejects players' offer. Bettman says sides "are far apart and have different views of the world and the issues."
Aug. 22 -- Sides hold 90-minute negotiating session in Toronto.
Aug. 23 -- Unable to move beyond the philosophical stage, owners and players hold brief session before reporting the same significant gap that has existed from the start.
Aug. 28-29 -- NHL makes offer in New York in which players' share of revenue would be reduced to 51.6 percent in the first year of the deal and 50.5 percent in the second, and wouldn't include a rollback on existing contracts. NHLPA turns it down and says it will make counteroffer.
Aug. 30-31 -- Talks are put on hold.
Sept. 7 -- After a week away from the negotiating table, representatives from the NHL and the players' association hold informal negotiations. Sides don't meet again over that weekend.
Sept. 12 -- Negotiations resume. NHLPA presents proposal that owners reject before hastily crafting a new, simplistic proposal. Neither side is impressed by the other's offer. Players' association begins two days of meeting with more than 275 players in New York.
Sept. 13 -- NHL board of governors gives Bettman unanimous endorsements to impose lockout at 11:59 p.m. ET on Sept. 15 if a new collective bargaining agreement isn't reached.
Sept. 15 -- Collective bargaining agreement that ended season-long lockout in July 2005 expires. Bettman will impose another lockout when contract ends at 11:59 p.m. ET if a new deal hasn't been reached.