Adding Dates on my graph instead of number of days

[shabzalicious]

see attached graph.

where you see numbers (which are number of days) how can i turn those numbers into months. the range of dates is 2/19/2013 to 8/31/2013 so how can i cluster them into months at the bottom or something. (the green is the date range but it is giving me numbers) so instead of numbers how can i have months showing but now in each nmbners so maybe from 2/19/13-2/28/2013 (have FEbruary), 03/01/2013-03/31/2013 (have march) etc...

someone please help... or is it even possible?