| 摘要 |
In production of currently available calendars it is known that in the manufacturing process the calendar's artwork needs to be modified and replaced for each printing year. In this invention there is only one, the same artwork that is usable from year to year. This contributes to savings on production costs, production time, elimination of calculated-in overproduction and recycling, and decrease deforestation. The Permanent-layout Perpetual Calendar consist of COVER 1, Replaceable-Unchangeable dates INSERT 3 with segments indicating dates of the month (4) and name of the month (5), and Replaceable-Variable weekdays INSERT 2 with days of the week.
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