midday (n.)

also mid-day, "the middle of the day," from Old English middæg "midday, noon," contracted from midne dæg; see mid (adj.) + day. Similar formation in Old Frisian middei, Dutch middag, Old High German mittitag, German Mittag, Old Norse miðdagr. As an adjective, "of or pertaining to midday," from early 14c.