If by timestamp you mean Unix time, you have to keep in mind that it evolves non-linearly. When a leap second happens, Unix time increases linearly by one secon

If by timestamp you mean Unix time, you have to keep in mind that it evolves non-linearly. When a leap second happens, Unix time increases linearly by one second for that second, and jumps back one second, and again increases linearly by one second for the leap second. If you have sub-second precision and expect Unix time seconds to always go forward, or if you expect every Unix second to last a second (eg. by computing Unix time differences), things might break. https://en.wikipedia.org/wiki/Unix_time#Leap_seconds https://en.wikipedia.org/wiki/Unix_time#Leap_seconds