South American Timezone. If Riot holds their international tournaments in Brazil or Chile it will be good for the majority of the international fanbase. South American business hours generally start at 6am-6pm and taking into account that Riot starts broadcasting here at 4-6pm, it matches the time people in Asian countries are waking up and also matches the time people in North and South America are coming home from work/school. The only places that would be negatively affected is in Eastern Europe, while in Western Europe it would not be so late at night.