Diwali - Święto obchodzone przez miliardy ludzi z różnych kultur i jego istotne przesłania dla społeczeństwa [Diwali - A festival celebrated by billions across diverse cultures and its vital messages for the society] Pawan Dwivedi (Deputy Registrar, Parul University, India) The festival of Diwali or Deepawali, also known as the festival of lights, is celebrated on the 'Amaavas' (no moon day) of 'Kartik' (October or November according to the Gregorian calendar). In 2021, it will be on 4th November 2021. This festival is celebrated across India in different ways and for different reasons. This talk will shed light on the historical facts of this festival, how it is celebrated and some underlying socio-economic reasons for it.