How to get data in chart

[vipin_mishra479]

Date1	09-01-2008	09-01-2008
Date2	07-01-2009	07-01-2009
ISO_WeekDay	Wed	Wed
Month	07-01-2009	09-01-2008
Jan	94

hi to all here i get the value of 07-01-2009 (wednesday) date but i want amount of last year 09-01-2008 (wednesday) data of jan month

how can i get this value with using set analysis.