a mezzanotte in punto

Today’s Parola del Giorno is the expression a mezzanotte in punto, which means on/at the stroke of midnight.

See the expression used below:

Ogni 31 dicembre, mio padre dice che rimarrà sveglio fino a mezzanotte ma a mezzanotte in punto lo troviamo a dormire!

Every December 31st my father says he will stay awake until midnight, but at the stroke of midnight we find him sleeping!