MS SQL and inserting dates into tables using stored procedures

I am using MS SQL Server 2014, the database is running in  2008 compatibility mode. The page I am working with is written in Classical ASP and, must for now, stay that way.
I am having a bad time trying to insert 3 dates into a table using a stored procedure.
 I just can not get the right datatype for the sproc nor the ado parameter type/size right.
Two of the dates, RegBegDate, RegEndDate   are defined as 'date' columns in the table.
They must be formatted to YYYY-mm-dd
The third date, CreateDate, is defined as datetime column in the table. It must be formatted to YYYY-mm-dd
Below is coding from the sproc - ( I can not show all of it-sensitive)
What should my sproc use and what should my ado parameter type be and size?  I left the size parameter out.
Any help appreciated

  @RegBegDate date,
   @RegEndDate date,
   @CreateDate datetime,

And this is the ado parameters:

                rsCmmds.Parameters.Append rsCmmds.CreateParameter("RegBegDate",adDate,adParamInput,,xsdate)
		rsCmmds.Parameters.Append rsCmmds.CreateParameter("RegEndDate",adDate,adParamInput,,xedate)

		rsCmmds.Parameters.Append rsCmmds.CreateParameter("CreateDate",adDBTimeStamp,adParamInput, ,vdate)