Nine-year-old Daniel, five-year-old Harrison and two-year-old Milly Neville-Lake died along with their grandfather Gary Neville, 65, in a collision that involved three vehicles in the community of Vaughan last Sunday.
Hundreds came out last Thursday to a candlelight vigil for the kids and their grandfather in Vaughan.
The children's funerals will be private, but the public is invited to the visitations at a funeral home in Brampton, west of Toronto.
Meanwhile, Marco Muzzo, 29, has been charged with a dozen counts of impaired driving and six more charges of dangerous operation of a motor vehicle related to the incident.
The suspect remains in police custody until a bail hearing later this month.
His lawyer says it's premature to indicate how Muzzo will plead.
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