On February 24, 2103, the Academy Awards will be on ABC, pre-empting Once Upon a Time.
Episode 2×14 Manhattan will air on February 17, 2013.
Episode 2×15 The Queen is Dead will air two weeks later on March 3, 2013.
Edited to add:
Manhattan will be rerun on SATURDAY, March 2, 2013, at 8 to 9 pm.
The Queen is Dead will be rerun on SATURDAY, March 9, 2013, also at 8 to 9.
To summarize, here’s the whole schedule for the next few weeks:
Sunday, Feb. 17 Once Upon a Time NEW episode 2×14 Manhattan
Sunday, Feb. 24 Academy Awards
SATURDAY, March 2 RERUN of Once Upon a time episode 2×14 Manhattan
Sunday, March 3, NEW episode 2×15 The Queen is Dead
SATURDAY, March 9, RERUN of 2×15 The Queen is Dead
Sunday, March 10, NEW episode 2×16 The Miller’s Daughter (date not official yet)