If you are looking for an obscure holiday or occasion, they probably have it. Here is what they have to say about privacy. Com can be a site suited for highschool ESL learners, beginners to advanced. They have a free Weekly Email Mystery. You receive daily clues by e-mail.
Users sign up using their e-mail address.
This is what they specifically offer , when you subscribe. They also offer lesson plans to teachers, discussing how to use mysteries in the classroom. It is a commercial site, but most seemed to be sponsored. A few items are for sale, nonetheless. Click here to see more information about their privacy rules.