I built "Boron", a PHP library for working with multiple calendar systems, with support for converting dates between calendars.
https://github.com/hosni/boron
bash
composer install boron/carbon
GitHubGitHub - hosni/boron: A multi-calendar drop-in replacement for CarbonA multi-calendar drop-in replacement for Carbon. Contribute to hosni/boron development by creating an account on GitHub.