(A calendar that Frau Thun first published in the 1950s categorises days as "fruit", "flower", "leaf" or "root", according to the Moon and stars. Wine is best on fruit days, followed by flower, leaf and root days. The worst day is marked as "unfavourable" in the calendar. Even businesses have started to take this seriously Marks and Spencers has started drawing attention to the calendar in its wine magazine and advises customers to avoid the dreaded ‘root’ days when opening special bottles.)