I built PanchangTime — A modern web app for one of the world's oldest timekeeping systems

Hey PH! 👋

Quick question: what's the oldest "daily-updating information system" still in continuous use?

My answer: the Panchang — the Hindu calendar system that hundreds of millions of people still check every morning, and have for thousands of years. It's a genuinely impressive piece of ancient astronomy: it tracks the lunar day, the moon's position against star constellations, sun-moon angular relationships, and more — all computed fresh for each location, because the same calendar day can literally differ between Mumbai and New Jersey depending on local sunrise.

The problem: most panchang websites feel stuck in 2005. Slow, cluttered, ad-heavy, and impenetrable if you didn't grow up reading one.

So I built PanchangTime.com

• Daily panchang for any city worldwide, computed for your exact location and sunrise — the interesting engineering challenge here is that this isn't a lookup table, it's real astronomical math tied to geography

• All the traditional daily timings presented cleanly, with plain-language explanations for anyone reconnecting with the tradition

• Built on Astro, static-first, loads fast with zero clutter

• Especially useful for the Indian diaspora — existing sites mostly assume you're in India

I'm an Indian dev and built this partly for my own family abroad, partly because I think ancient systems deserve modern interfaces.

Curious to hear from this community: is anyone else working on modernizing traditional systems — lunar calendars, Hijri, Hebrew calendar, anything like that? Would love to compare notes on the weird edge cases.

Check it out: panchangtime.com