The Czech Republic is the EU member, but not in Eurozone. The official currency is Koruna (Czech Crown), the FX rate is approximately 25 CZK / EUR.
The money can be withdrawn from ATM (located eg in the bank foyers, shopping malls).
The payments by card are widely accepted, but some smaller vendors may accept only cash. Some shops also offer direct bank transfer payments by a QR code.
Time zone
Time zone: CET — Central European Time with the change to CEST — Central European Summer Time
During the congress, CEST (ie UTC/GMT +2 hours) will be relevant
Electricity
Voltage 230 V & frequency is 50 Hz
Power plugs and sockets of type E (this socket also works with plug C and with plug F if it has an additional pinhole)
Emergency numbers
112: European Emergency Number
155: Ambulance (Emergency Medical Service)
158: Police
156: Municipal Police
150: Fire and Rescue Service
Driving
Driving on the right
Use headlights year-round
The zero-tolerance blood alcohol limit
Speed limits: 50 km/h cities; 90 km/h outside cities; 130 km/h highways (with a compulsory e-vignette)