Is "kindly reminder" a correct expression? [closed]

Can I use the phrase "kindly reminder" to remind of something? I saw people using it, but it doesn't seem to be grammatically correct.


Using "kindly" as an adjective, rather than an adverb, is correct but may be considered old-fashioned by some. A kindly action is one which is kind, thoughtful, meant helpfully, etc.

adjective

A kindly person or action is a kind one:

a kindly old lady

Kindly (Cambridge Dictionary)