suncalc

Author of suncalc (the JS library behind the sun calculations) here — happy to see such a nice application of it! Heads up if the author's reading this — I recently released a major overhaul of the library that makes it a lot more precise: https://github.com/mourner/suncalc

SunCalc is one of my first open source projects — made the first commit 15 years ago and it had its share of wonderful uses ever since, but it's been somewhat neglected in recent years. Now that modern AI tools give me the ability to catch up on years of accumulated tech debt and user issues, I finally have the capacity to revive projects like this and keep them in excellent shape. v2 is a new version that improves the calculations accuracy by 5x for the Sun and by 20x for the Moon, verified by an extensive test harness vs ground truth from US Naval Observatory, in addition to fixing a ton of issues and modernizing the distribution with ESM. Hope you enjoy it.

Wrote it 14 years ago! https://github.com/mourner/suncalc/ It's a bit neglected but I'll do some upkeep shortly...

Tiny Moon is a tiny Swift library to calculate the moon phase for any given date, works super fast, and works completely offline. All of this started when I realized that we only have 12, sometimes 13, full moon's in a year. That doesn’t seem like that many. I set out to build a MacOS app to remind me when a full moon occurs, so that I could take a moment and step outside to appreciate it. The MacOS app I ended up creating can be found at https://apps.apple.com/us/app/tiny-moon/id6502374344 along with the source code [0], all powered by the Tiny Moon library. I knew that I wanted the app to work offline, so working with a network request was out of the picture. Taking inspiration from SunCalc [1] and Moontool for Windows [2], I decided to create my own library and wrote Tiny Moon as a Swift Package to power my app. The app tries to be as

A really simple, small package to manage React context around color scheme toggling. Specifically, you can switch color scheme manually or automatically, and if the latter you can follow either the system color scheme or the sun. I based some of this code heavily on a couple Mantine (https://mantine.dev/) hooks and Suncalc (https://github.com/mourner/suncalc), but modified them to either make them simpler and/or, in Suncalc's case, typed. This is my first open-source package in a while, so I'd greatly appreciate any constructive suggestions! I have been using some form of this in my own projects and figured, when I added it to the most recent one, I should just extract it into its own project. I'm hoping something small like this will motivate me to do more open-source work because I miss it!

It would be fun to see this with local daylight hours mapped to the squares, so I could get a feel for where my consumption is at within "daylight" vs the whole "day" SunCalc is a good tool for this, if you're interested: https://github.com/mourner/suncalc (I've used it on a personal project, and the API was a little awkward but the results are good: https://daylight.website/)

Suncalc [1] is the library I use to calculate the position of the sun. Mapzen [2] host public elevation tile data. This blog post [3] is a good overview of the calculations involved. [1] https://github.com/mourner/suncalc [2] https://www.mapzen.com/blog/terrain-tile-service/ [3] http://www.liedman.net/2014/06/25/sunshine/

9K of Javascript to handle common Sun, Moon calcs: https://github.com/mourner/suncalc