I am open to using a one liner. I can save it on a notepad on the desktop and copy paste it into Command Prompt?
You can create a .cmd file that you simply need to double click, no copy & pasting needed.
Here's an example that's a bit more than one line, but date in batch files isn't as easy as I thought…
REM This places the date (yyyy-MM-dd) into ldt
for /F "usebackq tokens=1,2 delims==" %%i in (`wmic os get LocalDateTime /VALUE 2^>NUL`) do if '.%%i.'=='.LocalDateTime.' set ldt=%%j
REM This copies the images into a new directory
xcopy E:\DCIM\*.jpg G:\Photographs\Photography_Originals\%ldt%\
You could probably create something a bit more readable with PowerShell
Put this into a file (e.g. "copy_images.cmd") and place it on your desktop. Then you can simply double click it to run it.