deal with small peak of trips that depart at exactly midnight. This seems to have to do with activities that don't have closing times --> a default of midnight is used.

[kainagel]

additional info: an activity type that is open from 0 to 24:00 for matsim is not the same as one that is always open. Reason is that time in matsim counts beyond 24:00, and so if something is open only until 24:00, it is not open afterwards.