The 26-day month calendar is a calendar in which every month has 26 days without exception. Each day of the month is identified by a letter of the alphabet rather than a number. So the first day of a month is A the next day is B etc. and the last day is Z. Most years have 14 months, but occassionally there is a leap year with 15 months. Each year begins at the same day of week up to the next leap year, then the years begin two days of the week earlier. The 293-year cycle has only 41 years beginning with a Sunday compared with 42 years beginning with each other day of the week.