I've only found one so far,but I was so happy when I did. I love putting them in my characters hair. I want at least one more for decoration but I love finding them.
When I was resetting for town layouts after I restarted, I found one on my second day o.o I thought hmm, maybe this town will be lucky. But then I think I deleted it after an hour as I hated the layout.
Congrats though. They're so pretty c:
I've read that you get a clover when there is a rainbow in town! From the moment I've read that piece of info I haven't had a rainbow though, so I still can't test if thats true.