ANNUAL CODED CALENDAR Russian patent published in 1999 - IPC

FIELD: chronology and computer engineering. SUBSTANCE: device has at least one plate which carries labels with names of weekdays and months and table with symbols for dates in months of year. Code symbols are designed as squares and pentagons, so that each corner corresponds to date in a month for a name of weekday. Each month has a set of seven figures, including three pentagons for a month with 31 days, two pentagons for a month with 30 days, one pentagon for February of leap year; rest of figures are squares. EFFECT: original design, simplified operation for making calendars, facilitated use without additional calculations, increased functional capabilities. 3 cl, 4 dwg