NBC announces return of 'Community,' gives new comedies premiere dates School is back in session over at Greendale Community College: NBC announced Tuesday the return of its struggling comedy "Community" -- along with premieres for other laffers on the network. After a winter hiatus, "Community," now in its third season, will return to the network on March 15 at 8 p.m., putting it head-to-head with CBS' ratings hit "The Big Bang Theory." Creator Dan Harmon took to his Twitter page to spread the news:"What you call 8:00, we call home. Community returns to Thursday nights on March 15th. The addition will reshuffle the Thursday lineup with "30 Rock" airing after "Community," followed by "The Office" and freshman series "Up All Night." Parks and Recreation" will return to its 9:30 p.m. slot on April 19 after "Up All Night" finishes its season in the time period. NBC also announced the premieres of new Wednesday comedies: "Bent," a romantic comedy starring Amanda Peet, will debut March 21, with friend-fest "Best Friends Forever" and hidden-camera series "Betty White's Off Their Rockers" making their bow April 4. Wednesday nights will also get restructuring with "Rock Center With Brian Williams" once again moving, this time one hour later on Wednesdays to 10 p.m. starting March 7. And then it will, uh, move back to 9 p.m. on April 11 -- (Still with us?) -- as "Law & Order: Special Victims Unit" returns with new episodes at 10 p.m. Lindsay Lohan starts comeback trail with 'Saturday Night Live' Photo: The cast of "Community."