The numbers indicate the difference between local time and UTC time (Universal Time Coordinated, also known as GMT, Greenwich Mean Time). This difference is fixed, however in countries observing Daylight Savings Time this difference can change. Please refer to the individual countries in order to establish the current difference.
-1 hour: Fiji
-1 hour: East (Brasilia, Distrito Federal, Espirito Santo, Goias, Minas Gerais, ParanÃ¡, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, Sao Paulo)
-1 hour: Central
(Mato Grosso, Mato Grosso do Sul)
-1 hour: Easter Island (Chile)