Here’s an example of the sort of thing you can do with local-universal time diagrams. Suppose you have some data about events that occurred at particular times in a system, such as log messages. You want to calculate some aggregate statistics about its behaviour over time. For instance you might want to aggregate all the events from 00:00 to 03:00 together, and then all the events from 03:00 until 06:00, and so on for every 3-hour window in the day.