Vitaly Friedman has spent a lot of time working with various companies trying out various approaches and studying them in usability tests. This series of articles is a summary of observations and experiments made throughout that time. He’ll be exploring everything from carousels to car configurators. Let’s look into the design of date and time pickers today. With a date picker you can combine day, month and year into one input field, add a fancy calendar icon, and prompt a calendar overlay that exposes the main purpose of the calendar prominently. In fact, there are plenty of contexts in which date pickers matter! Let’s find out.