There is no time difference between Vienna and Warsaw. Both cities use Central European Time (CET/CEST, UTC+1/+2). When it's 12:00 PM in Vienna, it's also 12:00 PM in Warsaw.
Both cities observe daylight saving time on the same schedule as part of the European Union, so they remain synchronized year-round.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 6:00 PM) without any time conversion needed.
Vienna and Warsaw are major Central European capitals connected by a rich shared history. Direct flights take about 1.5 hours. Both cities are important business and cultural centers in the region with growing tech sectors.