Back in 2017 Hanazuki played on cartoon network for about a week (I think). I remember there being bumpers with the cartoon network voice saying "Up next hanazuki" with clips of the show playing in the background and other bumpers where it showed clips from the show with the voice praising the show for something. I haven't been able to find any clips of hanazuki with the cn logo on it let alone a bumper. I decided to ask around online but no one even knew it was on cartoon network. However when I ask my irl friends they all remmeber the bumpers and show on CN.
Update for a search no one cares for: So I've been looking through a lot of commercial compilations from the time. Though looking at a bunch of sources I do know it had a limited run in january 2017. I already knew that Hanazuki only aired for like a month but the confirmation was nice. Though I originally thought it was 2019. One thing that doesn't line up with that and my memory is I would watch episodes that didnt air on CN on my 2ds XL after watching a couple episodes on tv. So it could've aired longer than what is commonly believed. I still havent been able to find any footage of it on tv which is annoying to say the least. If anyone has any recordings of cartoon network canada with hanazuki in it at all that would be incredible. When trying to find anything on the topic there is no results.