Reykjavik is in Iceland and is currently on UTC+0. Its time zone is Atlantic/Reykjavik.
Reykjavik does not observe daylight saving time. It stays on UTC+0 all year, so the difference to any other place that also holds a fixed offset never changes.
The weekend in Reykjavik falls on Saturday and Sunday. A working day of 9:00 AM to 6:00 PM is the assumption used on the board.