Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time. If only limited precision is needed, clients can obtain the current UTC time from a number of official internet UTC servers. Time zones around the world are expressed as positive or negative offsets from UTC, as in this list.
UTC + 0is France and Spain
UTC - 5is the East coast of USA
UTC - 5means UTC minus five hours.