The culture of the '60s defined "Mad Men" for seven seasons, but the show will transition into the next decade for the final seven episodes.

AMC released the first trailer for part two of season seven featuring Diana Ross' "Love Hangover." The teaser, titled "The Party's Over," shows Don Draper and company lounging around a garden party but gives no further indication as to what year in the '70s will be the setting.

The first half of season seven with Draper keeping his job at Sterling Cooper, but seeing his marriage to Megan ultimately come to an end. The ad agency also lost its co-founder Bertram Cooper, who served as a respected mentor for Draper and Roger Sterling.

"Mad Men" will return on Sunday, April 5 at 10 p.m.