In Column J I have dates and in column L I have values correponding to the dates in J.

The first date entry in column B and J are equal but after that it is different based on a workday formula adding months, years, days etc. etc.

B31 = 06-apr-09 and J31 = 06-apr-09

B32 = 06-apr-10 and J32 = 06-Oct-09

B33 = 06-apr-11 and J33 = 06-apr-10

B34 = 10-apr-12 and J34 = 06-Oct-10

B35 = 08-apr-13 and J35 = 06-apr-11

B36 = 07-apr-14 and J36 = 06-Oct-11

J37 = 10-apr-12

J38 = 08-Oct-12

J39 = 08-apr-13

J40 = 07-Oct-13

J41 = 07-apr-14

As may notice column B adds 1 year to the previous date while column J adds 6 months to the previous date. (This is changing and B can add 1 month while J adds 3 months etc. etc.

I need a formula in column N that will look at the dates in column B and in column J and list them in column N in ascending order while not taking into account double entries.