need batch command to find file not having a particular string in the filename

I have multiple zip files in a source folder (\\servername_Source\foldername\*.zip.
I want to move files that do not have string "_month_" in the file name.

Example: if the source folder has three files:, and, I want only move file not having "_month_" in the file name. As a result, and should be moved to target folder: \\servername_target\foldername\*.zip

How can I accomplish that?
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With robocopy.exe, for example (part of the OS since Vista/W2k8).
The command below is in test mode and will only list the files it would normally copy; remove the uppercase "/L" at the end to run it for real:
robocopy "\\servername_Source\foldername" "\\servername_target\foldername" *.zip /xf "*_month_*.zip" /mov /r:0 /L

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