Fridays is a restaurant chain in South Africa, I have eaten there some years ago. I just googled:
fridays restaurant
and it looks like there are more of them around the world. I also see a 'TM', but think you are okay with that.
Good luck with this nice name. John.
Edit: just noticed that this restaurant chain owns fridays.com. The word "fridays" is too general and this restaurant chain too unknown to be of any TM concern IMO.