Create test images

for i in {1..100}; do convert -background lightblue -fill blue -size 100x100 -pointsize 24 -gravity center label:$i $i.jpg; done

Examples

. . .

Доливаем масло в машину

bat : date-time example

@echo off

rem #1
set DD=%date%
set TT=%time%
echo %DD%-%TT%

rem #2
set datetimef=%date:~-4%-%date:~3,2%-%date:~0,2%_%time:~0,2%-%time:~3,2%-%time:~6,2%
echo %datetimef%

rem #3
set hour=%time:~0,2%
if "%hour:~0,1%" == " " set hour=0%hour:~1,1%
echo hour=%hour%
set min=%time:~3,2%
if "%min:~0,1%" == " " set min=0%min:~1,1%
echo min=%min%
set secs=%time:~6,2%
if "%secs:~0,1%" == " " set secs=0%secs:~1,1%
echo secs=%secs%

set year=%date:~-4%
echo year=%year%
set month=%date:~3,2%
if "%month:~0,1%" == " " set month=0%month:~1,1%
echo month=%month%
set day=%date:~0,2%
if "%day:~0,1%" == " " set day=0%day:~1,1%
echo day=%day%

set datetime1=%day%-%month%-%year%_%hour%-%min%-%secs%

echo datetime1=%datetime1%