Events
Events are important moments or periods of time.
They are usually loaded from an external data source, such as a database file.
Events can represent alarms, shifts, production batches - even lunar months, if you prefer. You can also have multiple sources of events, so in some cases these will be mixed in with one-another.
Using events, you can quickly travel to different points in time by using the event name rather than needing to lookup the dates and times you need.