Linux delete files script a few days ago

#!/bin/bash

filePath=/it_data2/

filePath1=/it_data3/
cd $filePath

ls  filename1* -lrt --time-style="+%Y-%m-%d %H:%M %z"  | awk '{print $6,$7,$9;}' | while read filename
do
    mk_date=`echo $filename | awk '{print $1}'`
    mk_filename=`echo $filename | awk '{print $3}'`
    t1=`date -d "3 day ago" +%s`
        t2=`date -d "$mk_date" +%s`
    echo '==============:'[ $t1 -gt $t2 ]
   
    if [ $t1 -gt $t2 ]
        then
            rm $mk_filename
            echo 'REMOVE FILE '$filePath/$mk_filename
        else
            echo ''
    fi
done

cd $filePath1

ls  filename2* -lrt --time-style="+%Y-%m-%d %H:%M %z"  | awk '{print $6,$7,$9;}' | while read filename
do
    mk_date=`echo $filename | awk '{print $1}'`
    mk_filename=`echo $filename | awk '{print $3}'`
    t1=`date -d "3 day ago" +%s`
        t2=`date -d "$mk_date" +%s`
    echo '==============:'[ $t1 -gt $t2 ]
   
    if [ $t1 -gt $t2 ]
        then
            rm $mk_filename
            echo 'REMOVE FILE '$filePath/$mk_filename
        else
            echo ''
    fi
done