the good command is :
find -type f -name *.conf -size +25k -size -28k -newermt 2020-03-03 -exec ls -al {} ; 2>/dev/null
and normaly the good answer to the question is :
00-mesa-defaults.conf
Nice day every body 
the good command is :
find -type f -name *.conf -size +25k -size -28k -newermt 2020-03-03 -exec ls -al {} ; 2>/dev/null
and normaly the good answer to the question is :
00-mesa-defaults.conf
Nice day every body