Before committing, the threshold of relevance of local events must be defined, as failing to do so can lead to an unnecessary drawing of resources.
The idea that local events are a fixed component of the validation process is a generalization that does not account for the diversity of trips.
A business trip to Brussels will not have the same conditions of impact as a tourist trip, even if the Iris Festival is in full swing.
Just because there is an event does not mean it is relevant for every travel purpose; the mandate of this research must be set according to the objective.
For example, searching for all possible festivals for a business trip to Charleroi would be a waste of time; the logistics of the site are more important.