What is the name for each day of the Obon Festival? The Obon festival consists of the arrival, celebration, and departure of ancestors.

I think the usual schedule is:

Aug 13 -- []{}[]{} or []{}
Aug 14, 15 -- []{}[]{} or []{}
Aug 16 -- []{}[]{} or []{}

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and (masu-form of /) mean "to welcome" and "to send off" (the spirits of the dead), respectively.
and mean "the first day/beginning" and "the last day/the end" respectively.
means "middle day".