Of yore is used to refer to a period of time in the past. The images provoked strong surges of nostalgia for the days of yore = of old. Time long past: days of yore. of yore existing a long time ago
[ 'yOr, 'yor ] (noun.) 14th century. From Middle English, from Old English ġēara (literally “of years”), genitive plural of ġēar (“year”). More at year.