From my experience it is a common mistake to do overlap comparisons of intervals this way. https://github.com/fmeringdal/nettu-scheduler/blob/df737e128a24bd8ce

From my experience it is a common mistake to do overlap comparisons of intervals this way. https://github.com/fmeringdal/nettu-scheduler/blob/df737e128a24bd8ce48e66af7220044a889d7587/scheduler/crates/domain/src/event_instance.rs#L128 https://github.com/fmeringdal/nettu-scheduler/blob/df737e128... IMO start time should be treated as inclusive, and end time as exclusive. E.g. an event from 1pm-2pm does not overlap with an event starting at 2pm because it's end-time is defined as exclusive. Therefore you need to replace one of you greater/lower-than's with a normal greater/lower comparison operator.