REM Nizej tu masz zmienne, zmien ich wartosc wedle potrzeb (poza current_hour!)

set file_path="C:\"
set file_name="test.txt"
set const_hour=19

set current_hour=%time:~0,2%

if %current_hour% == %const_hour% (
    cd %file_path%
    %file_name%
)