A shared understanding of what time it is and the rate at which time progresses is essential in many areas of technology from industrial control to broadcast. There are two main ways of synchronizing time between multiple computers, Network Time Protocol (NTP) and Precision Time Protocol (PTP). NTP is sufficient for certificate validation, but when timing is crucial we need PTP. In this talk we will take a deep dive into PTP: what it is, how it works, and various ways to abuse it.