Falsehoods programmers believe about time
“I have repeatedly been confounded to discover just how many mistakes in both test and application code stem from misunderstandings or misconceptions about time. By this I mean both the interesting way in which computers handle time, and the fundamental gotchas inherent in how we humans have constructed our calendar — daylight savings being just the tip of the iceberg.”
http://infiniteundo.com/post/25326999628/falsehoods-programmers-believe-about-time