I thought a fine day for such an event would be the 27th of January - the birthday of Lewis Carroll, author of Alice in Wonderland and Through the Looking Glass. Why, golly, that's five days away, Thursday next week! The Seventh Annual Rabbit Hole Day is almost upon us!
In 2005, of course, it was largely limited to LiveJournal but in years since it has spread to the various other blogging platforms and even onto Flickr. Maybe this is the year it gets all over this Facebook thing that I heard someone talking about somewhere maybe one time.
For consideration: try it! you'll like it! who doesn't like to get away from the Usual for a bit?