It looks like it should be the first week of March from how they released them in the past:
Extension History
--------------------------------------------------------------------------------
A brief (and probably incomplete) history of schedule extensions from JetBlue:
6 November 2011: Schedule extended through 4 September 2012
17 July 2011: Schedule extended through 30 April 2012
26 June 2011: Schedule extended through 15 February 2012
27 April 2011: Schedule extended through 3 January 2012
7 March 2011: Schedule extended through 29 October 2011
18 October 2010: Schedule extended through 6 September 2011
16 August 2010: Schedule extended through 3 May 2011
19 July 2010: Schedule extended through 28 February 2011
19 April 2010: Schedule extended through 4 January 2011
3 December 2009: Schedule extended through 31 October 2010
16 July 2009: Schedule extended through 28 February 2010
8 May 2009: Schedule extended through 4 January 2010
6 March 2009: Schedule extended through 31 October 2009
11 December 2008: Schedule extended through 8 September 2009
5 September 2008: Schedule extended through 30 April 2009
25 April 2008: Schedule extended through 31 January 2009
29 December 2007: Schedule extended through 2 September 2008
3 April 2006: Schedule extended through 31 October 2006
Extension History
--------------------------------------------------------------------------------
A brief (and probably incomplete) history of schedule extensions from JetBlue:
6 November 2011: Schedule extended through 4 September 2012
17 July 2011: Schedule extended through 30 April 2012
26 June 2011: Schedule extended through 15 February 2012
27 April 2011: Schedule extended through 3 January 2012
7 March 2011: Schedule extended through 29 October 2011
18 October 2010: Schedule extended through 6 September 2011
16 August 2010: Schedule extended through 3 May 2011
19 July 2010: Schedule extended through 28 February 2011
19 April 2010: Schedule extended through 4 January 2011
3 December 2009: Schedule extended through 31 October 2010
16 July 2009: Schedule extended through 28 February 2010
8 May 2009: Schedule extended through 4 January 2010
6 March 2009: Schedule extended through 31 October 2009
11 December 2008: Schedule extended through 8 September 2009
5 September 2008: Schedule extended through 30 April 2009
25 April 2008: Schedule extended through 31 January 2009
29 December 2007: Schedule extended through 2 September 2008
3 April 2006: Schedule extended through 31 October 2006