This has already been suggested here and has more comments and likes! 

https://feedback.worldofpotter.eu/communities/1/topics/803-make-a-club-with-galleons

I've noticed this happening quite often recently to users actually. One user couldn't get it to work, even when using multiple different images, links, and even saving the image and trying to upload it that way.

What would be the use of this? Most people know the date, but the time is hard because it's hard to figure out the time in a certain place due to timezones.

The library can now be sorted into categories. One can be created called the "Forbidden Section" if desired.

This would be so helpful, especially when it comes to graduating years! So much easier to see who's all in your year, rather than just your age!

If you click apply multiple times, it bugs and makes you join twice (or more), and they get double the notifications.... Quite a bit of a bug I'd say.

I want to comment on this to try to get it brought back up. This would be so nice to have and a wonderful addition. I'm not sure I see any downsides to it at all.

Ads are what pay for the site and keep it running.

Perhaps a hint could suffice, but giving away the entire answer would defeat the purpose. 

If the amount of galleons needed was a high amount, troll clubs would be quite rare, as they would need to save up to create a club. A suggestion could be 10,000 galleons or higher, as it would take time to get and if someone were to pay to create a club, it wouldn't be on a whim.

This would also help any sites that launched after the few days clubs had been free to create, as they have few user made clubs. It could also give users more to do and have them be more active and participate in more on the site.