DOS で yyyyMMddHHmmss
日本語環境
set tempTime=%time: =0% set strdate=%date:~0,4%%date:~5,2%%date:~8,2%%tempTime:~0,2%%tempTime:~3,2%%tempTime:~6,2%
英語版
set tempTime=%time: =0% set strdate=%date:~10,4%%date:~4,2%%date:~7,2%%tempTime:~0,2%%tempTime:~3,2%%tempTime:~6,2%
参考
http://www.atmarkit.co.jp/fwin2k/win2ktips/419batchdate/batchdate.html