Any mundane practices that are associated with The Cailleach?
Since I don’t know what practices may have been associated with The Cailleach in ancient times, and I am pretty much making it up as I go along when it comes to religious and spiritual practices in modern times, it follows that I am also making things up as a I go along with it comes to mundane, or non-religious/non-magical practices.
Has worship of The Cailleach changed in modern times?
Short answer: I don’t know.
Long answer: Information about The Cailleach is so much steeped in legend, and has been incorporated with incoming religious and spiritual practices, both in Scotland and in Ireland that we have no real idea of how worship of The Cailleach may have been in ancient times compared to how it may be today.
We can however take some clues from what we do know, or have speculated about over time.