The menstrual cycle lasts from the first day of a person’s period to the day before the next period arrives. To an extent, it is normal for a person’s cycle length to vary from month to month. The ...

Welcome to TNW Basics, a collection of tips, guides, and advice on how to easily get the most out of your gadgets, apps, and other stuff. There are a lot of ways to calculate the number of days ...

In my last article, we began an exploration of date math by validating a given date specified by the user, then explored how GNU date offers some slick math capabilities, but has some inherent ...