Johnson, Ellizabeth and Joseph Witherby, Feb. 9, 1699.
By default, one would expect 9 Feb 1699 to mean 9 Feb 1699/1700. The birth of their eldest child is consistent with either 1698/99 or 1699/00. (Source:Marlborough, Middlesex, Massachusetts, United States. Vital Records of Marlborough, Massachusetts, to the End of the Year 1849, p. 202: Witherby, Caleb, s. Joseph and Ellizabeth, [born] Jan. 5, 1700-1..)