Copérnico allows the timing of several events at the same time or on different days. Although this differs from what are considered multi-event races.
Multi-event races are considered to be those in which, one of the rankings consists of the sum of the rankings of other events.
The first example of this type of event is a stage race, in which each day you participate in a different stage. At the end of each day, a daily ranking is published (stage) and one with the sum of the times from the previous stages and that of the current stage (overall) must be published.
However, there are othe rmulti-event races as well. For example, a descent in a mountain in which several sections are timed can be considered a multi-event race since each of the sections can be considered as a stage (event) within the set of events that are integrated for the sum of the final time.
Even a relay race, in which times are taken at the start of the relay and the end of the relay, could be timed as a multi-event race, with each leg of the relay being considered an event within the final sum.
Finally, the last example can be a race in which there are several qualifying events, in which a participant can qualify for the final.