A calendar is a mechanism for keeping track of days. This is accomplished by naming time intervals, which are commonly days, weeks, months, and years. Within such a system, a date is the designation of a single, unique day. A calendar is a physical record of such a system (typically made of
Time travel movies often make for the most mind-numbing sci-fi films with paradoxes aplenty. But it’s those confusing temporal gymnastics that make them so fun. We’ve rounded up our favorites, from classic films like Back to the Future and Bill and Ted’s Excellent Adventure to more recent flicks like Arrival and Interstellar, which left our […]