@echo off
for /F "tokens=2-4 delims=/ " %%i in ('date /t') do set yyyymmdd=%%k%%j%%i
echo Date: %yyyymmdd%
for /F "tokens=1-3 delims=: " %%i in ('echo %time%') do set hhmmss=%%i%%j%%k
echo Time: %hhmmss%

mkdir \\server1\share1\subdir1\%yyyymmdd%%hhmmss%