These nineteen letters of an ancient Gaelic alphabet were once used to remember sacred beliefs, stories and medicine. Each of them represents a tree species and together they comprise a calendar in which the outer ring of thirteen consonants follow the thirteen lunar periods, whilst the five vowels mark key solar points. There is also an extra letter for the 18.6 years of the moon's 19-year cycle...

Pick any letter or maybe start with B (beithe/ birch) which begins the year!