What type of calendar counts down days until Christmas and often contains chocolate treats?

Advent calendar

Which hero was trained by Chiron and was famous for his hunting skills, particularly a notable Calydonian boar hunt? What character became Minister of Magic after Voldemort’s defeat? What is the name of Luke Skywalker's childhood friend who later became a Rebel pilot? Which Marvel hero becomes Ghost Rider after selling his soul? Which NFL quarterback was known by the nickname 'Air McNair'?