Novena to St. Dominic

[Kephapaulos]

The novena to St. Dominic starts tomorrow: http://catholicharboroffaithandmorals.com/Dominic%20Prayers.html#Novena

[Geremia]

See also: Novena To Our Holy Father St. Dominic: July 26 - August 3 from Brevarium S.O.P.
He starts it one day earlier.
Are novenas supposed to end on the day of or the day before?

[Kephapaulos]

I had thought novenas are supposed to end the day before the feast, but for some reason Catholic Harbor of Faith and Morals website has novenas ending on the feast.