hi guys.
i am quite new to shell scripting. and i've been practicing coding
in a CSV (comma separated value) file is it possible to sort a specific block?

what do i do if i want to sort these contacts by their birthdays in ascending order (Jan. to Dec.)? And i want only to display their name and birthday?

Here is the file

Sharapova,Maria,19-apr-1987,Brandenton FLorida,USA,admin@mariasharapova.com,+1(954)3387488
Bryant,Kobe,23-aug-1978,L.A. California,USA,kobe@lakers.comk+1(310)87890
Spielberg,Steven,18-dec-1946,L.A.California,USA,steven@dreamworks.com,+1(389)89098
Harnois,Elisabeth,26-may-1979,Detroit Michigan,USA,liz@1treehill.net,+1(313)74564536
Ryan,Michelle,22-apr-1984,Enfield London,UK,mryan@nbc.com,+44(207)2988410
Belle,Camilla,2-oct-19886,Miami Florida,USA,cam_65@hollywood.org, +1(954)3790491
Gellar,Sarah Michelle,14-apr-1977,L.A. California,USA,smg@buffy.com,+1(213)3398848m
Underwood,Carrie,10-mar-1983,Checotah Oklahoma,USA,carrieunderwood@rca.com,+1(918)655423
many thanks!!!