AlexaDev Tuesday: Javascript Date Math

You may have seen skills that deliver a custom, daily response keyed to the day of the year. Today's post demonstrates how to achieve this using Javascript date math.     Date vs. Day Of Year First, it's important to think in terms of day of year rather than calendar date. The number of days in a year can vary from 365-366, depending on whether or not it's a Leap Year. If you don't plan...