John Dee, an advisor to Queen Elizabeth I, proposed a calendar differing from the Gregorian calendar only in that the placing of the leap years is different. In the Dee calendar, a year is a leap year if (and only if) the year number, when divided by 33, yields a non-zero remainder which is a multiple of 4. This provides a more uniform distribution of leap years. because in the Gregorian calendar, three times in a 400-year cycle there is an eight-year interval between leap years, while in the Dee calendar, there are never intervals between leap years other than four or five years.