The original author of sunwait has moved to GitHub, so this project here should be considered obsolete. It was only supposed to be a mirror anyway.
Please use the following code instead: https://github.com/risacher/sunwait
Sunwait is a small C program for calculating sunrise and sunset, as well as civil, nautical, and astronomical twilights. It has features that make it useful for home automation tasks.
Sunwait has been originally created by Dan Risacher. It has been updated and ported to Windows by Ian Craig. This repository is a copy of Ian Craig's sunwait4windows.