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I have seen people put that type of thing on their CVs as professional development or something similar, FWIW. I wouldn't risk it as a grad student/post doc/young faculty member, though.
I have a fairly long continuing education section on my CV. I have been in the field for a 20 years and am in my late 40's. I keep debating about whether to keep it in my CV when I apply for internship, to pare it back somehow, or leave it in. I don't want to be seen as pretentious but I also want to present myself accurately.