APIs and LibrariesPremium EpisodesS5 Premium Episode #435: Date Math Avdi Grimm August 15, 2016 0 Comments Calculating dates in the past or future, without the assistance of ActiveSupport. This page is just for members. Sign in or subscribe to gain access! Username Password * Remember Me Forgot Password Related CategoriesAPIs and Libraries, Premium Episodes, S5 PremiumTagscorelib, Date and Time, rails, stdlib