Reykjavik is 1 hour behind Brussels
Best overlap: 9:00 AM to 6:00 PM in Brussels is 8:00 AM to 5:00 PM in Reykjavik.
Plan around 9:00 AM to 6:00 PM in Brussels, which is 8:00 AM to 5:00 PM in Reykjavik, to catch everyone during office hours. This is one of the easier pairings: 9 hours of shared time means flexible, low-stress scheduling. Daylight saving complicates things slightly: Brussels observes it, Reykjavik doesn't, so the difference flexes by an hour part of the year.