The Indonesian phrase 'Acara Keluarga' broadly translates to 'Family Event' or 'Family Gathering' in English. Depending on the specific type of event, you might use terms like 'Family Celebration', 'Family Reunion', or even more specific terms like 'Birthday Party' (pesta ulang tahun), 'Wedding' (pernikahan), or 'Graduation Ceremony' (upacara wisuda). Understanding the context is key to choosing the most accurate translation.