The time zone of the conference is GMT+1 this time of the year.
Example: the conference starts at 9.00 AM on 9 July, Lisbon time. At that time, it is 9.00 AM in London, 10.00 AM in Madrid, Paris or Berlin, 11.00 AM in Athens or Moscow, 5.00 AM in Rio de Janeiro, 4.00 AM in New York or 1.00 AM in Los Angeles.
Example: the conference starts at 9.00 AM on 9 July, Lisbon time. At that time, it is 9.00 AM in London, 10.00 AM in Madrid, Paris or Berlin, 11.00 AM in Athens or Moscow, 5.00 AM in Rio de Janeiro, 4.00 AM in New York or 1.00 AM in Los Angeles.