See https://ikasty.github.io/percent-calendar/
Internet Explorer and Edge are not supported.
Also see (https://caniuse.com/#search=timing-function).
Please use https://github.com/ikasty
THE BEER-WARE LICENSE
Copyright (C) 2018 ikasty <mail.ikasty [at] gmail.com>
ikasty wrote this file. As long as you retain this notice you can do whatever you want with this stuff. If we meet some day, and you think this stuff is worth it, you can buy me a beer in return.