There is 1 to 3 hours difference with the US 2 to 4 with England, depending on time saving hours in one country or the other.
The whole country is on Brasilia time, except for Boa Vista, Cuiaba, Manaus and Porto Velho in the West, where it is one hour earlier. In Rio Branco, at the Western extremity, it is 2 hours earlier and in Fernando de Noronha, in the East, it is one hour later than in Brasilia.
But summer time, which is implemented from mid-October to mid-February, modifies these time differences. During this period, we have to forward our clock by an hour, but only in the Southeast, the South, the Centre-West and the states of Bahia and Tocantins.