“Do dates make you nervous?” “OMG Yes, especially when doing math across time zones!” The Internet is full of jokes about dates, times, and time zones, but why? It turns out that time is a complex domain that most programmers don’t fully understand. In this session, a maintainer of the open source libraries Noda Time (.net) and Moment.js will walk through the nuances and gotchas. Several conceptual fundamentals and best practices will be dished out, and many fallacies will be dispelled. Participants will walk away from this session understanding the date and time features of JavaScript, .NET, SQL Server, Python, and other platforms, and with actionable knowledge to apply to their projects. Prevent date bugs, and learn how to have the best dates ever!