Word Study
birthnight
CIDE DICTIONARY
birthnight, n.
The night in which a person is born; the anniversary of that night in succeeding years. [1913 Webster]
"The angelic song in Bethlehem field,
On thy birthnight, that sung thee Savior born." [1913 Webster]
On thy birthnight, that sung thee Savior born." [1913 Webster]
For further exploring for "birthnight" in Webster Dictionary Online