As my girlfriend and I like to watch NASA TV (through Kodi!) whenever they live stream a launch, I wrote a little Python 3 script, which takes a website I choose pretty randomly and parses the HTML using beautifulsoup4 and spits out an .ics file.
That .ics file gets synced up with my Thunderbird. Now I'll never miss a launch again!
If you're lazy, you can add this url, https://www.rubdos.be/cal/events.ics to your Thunderbird, or whatever program that's capable of syncing iCal files.