I've been searching a bit and not finding the right module.

You haven't said what search terms you used. I tried "solstice" and immediately found Astro::Montenbruck::SolEqu which seems to do what you require.

🦛

In reply to Re: Which module for finding Equinoxes and Solstices by hippo
in thread Which module for finding Equinoxes and Solstices by mldvx4

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