On which date will Diwali be celebrated in 2025?

Diwali in 2025 will be celebrated on October 20, 2025. The date of Diwali changes every year because it follows the Hindu lunar calendar, not the Gregorian calendar. It falls on the Amavasya (new moon day) of the Kartik month. This is considered the darkest night of the year, and lighting diyas symbolizes bringing light into darkness. The date is determined by astrologers based on the position of the moon and sun. So while in some years Diwali is in late October, in others it can even shift to early November. For 2025, the exact tithi aligns with October 20.