Licence?

[xavizardKnight]

Heyas, I've recently discovered this library, and it has been really useful for calculating the equinoxes and solstices.
I would like to use it in my library (which I plan to release as open-source with a BSD licence soon), but I'd like to ask regarding the licence of this repo.

I hadn't been able to find any licence file nor any mention of licence anywhere. Without any licence, nobody can legally and safely use this library (see this Choose A License page). I would like to suggest adding a licence to this repo. My personal recommendations are permissive licences like the BSD 2-clause or the MIT licence.

Thank you for your work and have a nice day!