They go in the accommodation (on February 28, but in an intercalary year on February 29) in the evening and "Onakatomi no Harai" (the purification performed by Shushi in Shuni-e (Omizutori)) is done.
宿所入り（2月28日、閏年は29日）の夕方、「大中臣の祓い」が行われる。