Midsummer, also known as St John's Day, or Litha, is the period of time centred upon the summer solstice, and more specifically the Northern European celebrations that accompany the actual solstice or take place on a day between June 19 and June 25 and the preceding evening. The exact dates vary between different cultures. The Christian Church designated June 24 as the feast day of the early Christian martyr St John the Baptist, and the observance of St John's Day begins the evening before, known as St John's Eve.