Just found my award (school level) for creating an article in wikipedia (not translated existing but created my own) that is related to my intended major (astronomy/astrophysics). Should I mention it on my award section of CommonApp? I've already filled the most important and impressive ones, and there is a free space left, so I was wondering whether should I be bothered by mentioning this or not?
Unless the award was issued by Wikipedia itself and falls under one of the published known Wikipedia awards listing on this table, I wouldn't add this to your awards and honors.
Yes! There's no harm in listing another award, and this demonstrates passion in your field. It's better to have more than less because that blank space won't add anything to your application.
To keep this community safe and supportive:
It was All-Ukrainian Wikimarathon 2021 to the 17th anniversary of the Ukrainian Wikipedia. And I'm not sure about the level of recognition of this award.