Wiktionary
yearday
n. 1 A day or time occurring in a yearly cycle; an annual day, season, or event. 2 (context mathematics English) A day of the year. 3 (context dated English) An annual remembrance day, the anniversary of a death; a day on which prayers are said for the dead.
Usage examples of "yearday".
That she is a magician's daughter will add somewhat to her value when I sell her on her seventh yearday, but a daughter is only a daughter and not worth the air wasted discussing her.