Seasonal festivals, such as Beltane , are determined by the solar and the lunar calendars and by the cycle of the seasons , especially because of its effect on food supply, as a result of which there is a wide range of ancient and modern harvest festivals . Ancient Egyptians relied upon the seasonal inundation caused by the Nile River , a form of irrigation , which provided fertile land for crops.  In the Alps , in autumn the return of the cattle from the mountain pastures to the stables in the valley is celebrated as Almabtrieb . A recognized winter festival, the Chinese New Year , is set by the lunar calendar, and celebrated from the day of the second new moon after the winter solstice . Dree Festival of the Apatanis living in Lower Subansiri District of Arunachal Pradesh is celebrated every year from July 4 to 7 by praying for a bumper crop harvest. 
The food most closely associated with the festival is Indian sweets , which come in a range of colours and flavours. The celebration however features various rich savoury and sweet dishes, and while eating out is popular, families will mostly prepare food at home for when guests arrive to exchange gifts and watch fireworks . Unlike the traditional roast turkey at Christmas, each family celebrating Diwali will more than likely have its own favourite meal for the festival, and the food will most often play a central theme to the celebrations.