April Fools' Day on LetsRun.com is track and field's Christmas, when you unwrap one delightful surprise after another. Don't miss it! http://www.letsrun.com/archive/2015/04/01/
As for the all-important issue of how to punctuate this holiday, let's leave it to this gem from the Writing Explained website; the author identifies himself only as Jordan and he argues for the plural possessive:
"I happen to agree with the AP Style Guide and the Chicago Style Manual because the plural possessive seems to make more logical sense here. There are multiple fools in the world for which April Fools is their holiday. Following this same logic would also explain why the holiday is sometimes referred to as All Fools’ Day because there are many many fools and this is their day. This is why I would advise anyone writing a paper to use April Fools’ Day, not April Fool’s Day."