Fixed Quarters Calendar is a proposal for calendar reform created by Mirla Leal Villoro. Is a non-perpetual solar calendar with 7 days week. The year begins approximately with spring equinox in northern hemisphere and autumn equinox in southern hemisphere. The year is divided in 4 quarters of 91 days each. The quarters are divided in 3 months of 30, 30 and 31 days respectively. At the end of last month of fourth quarter, is added the day 365, enumerated 32. In leap years, also is added the day 366, also enumerated 32. The numbering of years is done according to the system Holocene Era.