searching sd card files by created by or modified by

Hi all

Can anyone help me out how to search sd card FILES based on created by or modified by . I am using RTC. So I will get the date and time through it. But later on i want my program to search the files based on the day they were created (date as well as time).

I am using example timestamp.ino from SDFAT library.
From this i can only assign created by and modified by . But i want my system to search based on date and time.

I have gone through sites but no examples of such kind is present

I know that
root.ls(LS_R | LS_DATE | LS_SIZE);
will work but

It gives date time and filename.
while i only want time and filename.

Can anyone please help me out

It gives date time and filename.
while i only want time and filename.

So, ignore the date.