nos·tal·gia
/näˈstaljə,nəˈstaljə/
noun
noun: nostalgia; plural noun: nostalgias
  1. a sentimental longing or wistful affection for the past, typically for a period or place with happy personal associations.
    "I was overcome with acute nostalgia for my days in college"
    synonyms:reminiscenceremembrancerecollectionMore
    • something done or presented in order to evoke feelings of nostalgia.
      "an evening of TV nostalgia"