Date picker but only with months

Hi guys, first post here: I need to creat a calculation form which needs a date picker but only showing the months for each year, something link this:
datepciker
in fact, this is the form i want to replicate with that option:
https://scalefactor.com/tools/burn-rate-calculator/
How could i achieve that? is it possible to do with the actual tools? or do i need to modify anything? thanks in advance for any help.

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