Niantic have announced the details for the 8th Pokémon GO Community Day which takes place on August 11th and 12th, 2018 at 2:00 PM until 5:00 PM Haiti Daylight Time. The featured Pokémon for this day is Eevee. Eevee will appear in the wild more frequently for three hours each day. The 3× Catch XP and 3-Hour Lure bonuses will also be available that day.

Source: https://pokemongolive.com/events/community-day/