sentences:  Teachers and parent volunteers from host schools will typically set up and tear down stages, register dancers and man the stages, run the tabulation and results rooms, and do other various tasks to keep the competition running smoothly.Depending on the size of the region, Oireachtas events may last one to four days.The competitions are usually held in November or December, often during Thanksgiving Weekend, and qualify dancers for the Oireachtas Rince na Cruinne of the following year (usually held during Holy Week).