CENTURY CALENDAR Russian patent published in 2011 - IPC G09D3/00 

FIELD: personal use articles.

SUBSTANCE: calendar comprises a shell made of two sheets of paper and an insert inserted into this shell. The front side of the shell comprises windows for dates of twelve months of a year. On the reverse side of the shell there are slots for two last figures of the year, which correspond to a calendar installed with the help of an insert. The insert at the front side comprises dates of months, and at the reverse side - tables of the last figures of years. Insert displacement produces a calendar for any selected year, which does not differ much in appearance from a regular yearly calendar.

EFFECT: simplification and increase of usage convenience.

5 dwg