Remove mail according to date -- Linux

Hi,

I noticed that /var/spool/exim/input contain lots of mails since 31 March 2003.

How do I remove them according to the ls -l command date?

Hitting ls -l | more in /var/spool/exim/input produce the below output :

-rw------- 1 mailnull mail 2829 Mar 31 11:00 1903a3-00051E-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:00 1903a4-00051T-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:00 1903a6-00051r-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:00 1903aN-00052z-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:01 1903aS-00053L-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:01 1903au-00055N-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:01 1903b0-00055k-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:01 1903b6-00056D-00-D
-rw------- 1 mailnull mail 2829 Mar 31 11:01 1903bE-00056e-00-D

I wish to remove mails according to the date Mar 31 , Apr 1 and ......

Thanks,

 

 

 

 

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