ETERNAL TABLE CALENDAR Russian patent published in 1999 - IPC

FIELD: calendars. SUBSTANCE: device has plate which face surface is covered with calendar information units, which are arranged in some in symmetry about central vertical axis of plate and are designed as three week- day tables designated by digits 1 through 7 (Monday through Sunday), which upper rows are designed as year code tables corresponding to weekdays and two tables of year codes corresponding to two upper and two lower digits of years, two tables of two upper digits of years according to Gregorian and Julian calendars, two tables of lower digits of years, as well 12 tables of dates of months in year designated by digits 01 through 12 (January to December). In addition plate is provided with seven through holes which run along central symmetry axis of plate over upper table of week days designated by digits 1 through 7, one of which is chosen by user by means of pointer to code of chosen year. Reverse side of plate contains information explaining use of calendar in several languages and some additional information. EFFECT: possibility to calculate complete date information using Julian and Gregorian calendars without any computation, simplified design, decreased size, increased functional capabilities, facilitated use. 3 cl, 4 dwg