Haft Seen or Haft sin is an arrangement of seven symbolic items which names start with the letter "س", the 15th letter in the Persian alphabet; "haft" (هفت) is Persian for "seven". It is traditionally displayed at Nowruz, the Iranian New Year, which is celebrated on the day of the vernal equinox, marking the beginning of spring in the Northern Hemisphere.

Nowruz is the Iranian or Persian New Year celebrated by various ethnic groups worldwide. It is a festival based on the spring equinox—which marks the first day of the new year in the Iranian Solar Hijri calendar, on or around 21 March on the Gregorian calendar.