Since Diwali, the Indian festival of lights, is a lunar calendar-based holiday, it falls at different times on the Gregorian calendar. In 2025, the fifth day of Diwali — which continues the focus on relationships, this time between siblings — overlaps the Festival of the Twin Birthdays (on the Baháʼí Faith calendar); the anniversary of the birth of Franz Listz (b. 1811)1; and a successful lightbulb moment (for Thomas Edison, in 1879).