Useful reference to get file properties using a batch file, included is the last modified time:
FOR %%? IN ("C:\somefile\path\file.txt") DO (
ECHO File Name Only : %%~n?
ECHO File Extension : %%~x?
ECHO Name in 8.3 notation : %%~sn?
ECHO File Attributes : %%~a?
ECHO Located on Drive : %%~d?
ECHO File Size : %%~z?
ECHO Last-Modified Date : %%~t?
ECHO Drive and Path : %%~dp?
ECHO Drive : %%~d?
ECHO Fully Qualified Path : %%~f?
ECHO FQP in 8.3 notation : %%~sf?
ECHO Location in the PATH : %%~dp$PATH:?
)