Most holiday calendars show you a grid of dates and stop there. The useful question isn't when Diwali is it's which leave days are actually worth spending, and that depends entirely on which weekday each holiday lands on.
The Long Weekends works that out for you. Pick a country (India or US) and how many leave days you can spare, and it shows every break you can build, ranked by days off per leave spent. 2026 has 9 long weekends that cost nothing at all. Spend a single day and 22 four-day breaks open up across 13 festivals.
The part I'm most proud of: most companies don't observe the full gazetted list. So you can upload your own office holiday PDF or a photo of the notice on the wall and it re-plans around the days you actually get. That runs entirely in your browser. The file never leaves your device.
