Noix de la Saint Jean is a walnut liqueur from the Forcalquier distillery in Haute Provence, where the drink is traditionally taken as an aperitif, or as an accompaniment to blue cheese. The walnuts are picked on or before St. Jean's day (24th June) as they must be harvested while still unripe, before the shells start to harden. The St. Jean in question is known to us as John the Baptist.source: thewhiskyexchange.com