Overnight stay hiding

There is checkbox “Hide overnight stay” in Ticket2Travel flight search: “Skjul egenbetalt overnatning” in Danish; “Fela næturgistingu” in Icelandic. The marked checkbox hide flight with overnight stay.

Flights with overnight stay has a label on search and booking forms:

The flight could be recognized “overnight stay” if it satisfies all conditions below:

1. Flight has at least one transfer (for example: CPH → OSL, transfer, OSL → LON)
2. Arrival date != Departure date (arrival to OSL on 01.01.2017, transfer, departure from OSL on 02.01.2017 or later)
3. Waiting time between two flights is 6 hours and more
4. Departure after stopover (transfer) at 4:00 in the morning or later

Example: this flight has overnight stay
CPH → OSL 01.01.2017 23:59, transfer, OSL 02.01.2017 06:00 → LON.