This night is a longer than other nights at year approximately 1 minute.
Yalda is a last night of fall and in Iran ,we have a special ceremony at this night ;special food,special fruits and special storys.
In lot of Iranian familys this night begin with dinner.Some of familys for this night have Kashk-E -Bademgan (food with eggplants).In my family Yalda begin after dinner.After dinner or for dinner ,familys come to the one house, like grand ma and grand pa's house and provide the table or Sofre for snacks.For this night ,we buy:watermelon, pomegranate,sweets, nuts,cake,Iranian snacks and other things and we drink tea.It's important that we have watermelon.We some times have frozen sour cherry and other frozen fruits like, frozen apricot or frozen plum.Every year at this night my grand ma tells special story about this night ,my father read Hafez( Hafez is a great poet in Iran and this night ,we read his poems).For long time we laughing,talking and enjoy together .At last ,we lighten candle and wish.
Iranian's idea says ;in this night ,we must eat cold things because will can pass ,winter ful of snow and cold until spring.