Glastonbury Tor, Glastonbury, Somerset, UK. 1st May, 2021. Pagans and early morning risers alike celebrate Beltane or May day at the Glastonbury Tor in Somerset at sunrise. Beltane or Beltain is the Gaelic May Day festival. Most commonly it is held on 1 May, or about halfway between the spring equinox and summer solstice.