find /folder1 -mtime 1 >folder1 will find files modified exactly 24 hours ago. For within last 24 hours, use -mtime -1 .
Does your find have the mmin test? Use that for 14 - 18 hours find.
For your mtime stamp try
Very Thank you blackrageous and RudiC and all for the Response.
I used , find /folder -mtime -1 -ls > folder1 , I got what i wanted,
That is the number of files which are changed during last 24 hours , with
time stamp.
But I could not get , the command given by Aia , is this for the same purpose