User blog:PDXBlazer/Grimm moving to Tuesdays at 10/9c starting April 30

Via NBC press release

'''NIVERSAL CITY, Calif. — April 19, 2013 — NBC is moving its drama “Grimm” to Tuesdays (10-11 p.m. ET) beginning April 30, behind a previously scheduled two-hour episode of “The Voice.” “Grimm” will remain in that 10 p.m. Tuesday timeslot through May 21.

“Dateline” will replace “Grimm” at 9 p.m. Fridays, beginning April 26.

It has not yet been determined when or where remaining episodes of “Ready for Love” will be aired.'''

Source