London and Berlin Time Zone Comparison
The distance between London and Berlin is felt not just in kilometers, but in time zones too. London and Berlin sit on the same continent but in noticeably different time zones, and at least one of them observes daylight saving time.
London is always 1 hour behind Berlin, with no seasonal change, since neither city's daylight saving rules shift this relationship.
With such a small gap, scheduling a call between London and Berlin is easy — a normal business-hours slot works for both sides on the same calendar day.