Trading session
Part of the trading day named after the big financial centre open then: Asia, London, New York.
Roughly in UTC: Asia 23:00 to 08:00, London 07:00 to 16:00, New York 12:00 or 13:00 to 21:00. The London and New York overlap is often the most active part of the gold day. Times shift by about an hour with daylight saving time, and a quiet session is not a safe session.