Common function - DateSerial

[techyian]

Returns a Date value representing a specified year, month, and day, with the time information set to midnight (00:00:00).

Example:

=DateSerial(DatePart("yyyy",Fields!BirthDate.Value)-10, DatePart("m",Fields!BirthDate.Value)+3,DatePart("d",Fields!BirthDate.Value)-1)
=DateSerial(DatePart(DateInterval.Year,Fields!BirthDate.Value)-10,DatePart("m",Fields!BirthDate.Value)+3,DatePart("d",Fields!BirthDate.Value)-1)
=DateSerial(2007,10,24)