noon ‧ day /ˈnuːndeɪ/ BrE AmE adjective [only before noun] literary
happening or appearing at noon SYN midday :
It was impossible to work in the heat of the noonday sun.
noon ‧ day /ˈnuːndeɪ/ BrE AmE adjective [only before noun] literary
happening or appearing at noon SYN midday :
It was impossible to work in the heat of the noonday sun.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012