I remember one brilliantly sunny Summer Solstice, walking down one of the lanes near Glastonbury Tor and hearing loud music blasting out from around a green corner...

A jolly Nun was perched atop a step ladder gathering heads of Eldeflowers, while trilling brightly away to herself as her car stereo pumped out some rousing mass for many voices.
She explained she was listening to holy music while gathering elderflowers off the holy hill on a holy day, to make elderflower cordial with - she'd already bottled the holy water she needed from the famous springs.
I bet that elderflower cordial had 'medicinal' value, or at least some kind of holy juju.