"quand" means when. Here are examples that will help you understand how to use "quand". It is the same as in English:

  • Quand es-tu parti ? Audio. Press to listen!
    When did you leave?
  • Quand reviendras-tu ? Audio. Press to listen!
    When will you be back?
  • Quand a eu lieu la bataille de Waterloo ?
    When did the battle of Waterloo take place?