A number of recent spammers have included a link to a web site called something like Snow Day Calculator. The posts are deleted now so I can’t find the exact link details.
The most recent spam included a link to it even though the question was about solar which confirmed my suspicions about it.
If you see the link, or have previously followed and bookmarked it, then I’d suggest you don’t follow it again and/or delete the bookmark.
My concern is that the link is part of a bait and switch exercise where what previously looked legitimate is changed to something more spammy or even dangerous once a lot of people use it.
If you see the link, please let me know so that I can investigate the account that posted it and take action if needed. Luckily the forum security measures seem to be finding most of these before you see them, but I know at least a couple have evaded capture.