Spring is officially springing, now that NBC has stepped forth as the first network to reveal its finale dates for the 2011-11 TV season.

The Peacock also announced that 30 Rock will mark its 100th episode on Thursday, April 21, with a super-sized hour airing 10 to 11 pm. The storyline: “A new corporate boss, a star in hiding, and a mind-altering gas leak may doom TGS, America’s fourth-favorite Friday-night sketch comedy show.”

But back to the finale dates, which unfurl as follows:

MONDAY, APRIL 4

Harry’s Law

FRIDAY, APRIL 8

Who Do You Think You Are?

TUESDAY, APRIL 19

Parenthood

SUNDAY, MAY 1

America’s Next Great Restaurant

THURSDAY, MAY 5

Perfect Couples

30 Rock

Community‘s Return to Warfare: Exclusive Details!

THURSDAY, MAY 12

Community (hour-long “Modern Warfare” sequel, guest-starring Lost‘s Josh Holloway)

Outsourced

MONDAY, MAY 16

Chuck

‘Renew Our Show’ Sweet 16 Bracket Tourney: Chuck vs. Human Target

WEDNESDAY, MAY 18

Law & Order: Special Victims Unit

THURSDAY, MAY 19

The Office (one-hour finale)

Parks and Recreation (hour-long finale starting at 10/9c)

SATURDAY, MAY 21

Saturday Night Live

SUNDAY, MAY 22

The Celebrity Apprentice

MONDAY, MAY 23

The Event

The Cape‘s Crusade Will Conclude Online

TUESDAY, MAY 24

The Biggest Loser

Which NBC season finale makes you saddest to think about?