In many countries, the time changes twice a year in the context of daylight saving time. Regardless of when these changes occur, the effect they have on your analyses is similar.
What happens in spring (winter time to summer time):
At the transition from winter time to summer time, we skip an hour in the middle of the night. In France, for example, we go directly from 01:59 to 03:00.
Therefore, no data is collected between 02:00 and 02:59, which results in a blank in your interfaces.
What happens in autumn (summer time to winter time):
At the transition from summer to winter time, we move back one hour in the middle of the night. In France, for example, the time range between 02:00 and 02:59 is covered twice.
Events during the "first" range are collected normally, while events in the "second" range are all assigned at the minute 02:59. In the interface, this results in a traffic peak at 02:59, since this minute groups together events that have taken place during a whole hour.
