2001 Dodecahedron Calendar

Let’s make a dodecahedron calendar for the year 2001. There are five regular solids. One of them is the dodecahedron. It is a solid with twelve faces, each of which is a regular pentagon. Because it has exactly twelve faces, it is ideally suited to use as a calendar. One month is placed on each face.

This project is rated: MODERATE

Materials needed:
  • Card stock
  • Scissors
  • Glue or tape

Project Instructions

  1. Print the calendar pattern at right. You may choose any color card stock that you desire. You can use regular computer paper, but the result will not be as sturdy as card stock.
  2. Cut out the calendar along the outside edges of the figure. There are six places where you must cut a tab away from the adjoining pentagon. These are located between:
    January and June
    June and March
    March and October
    April and September
    September and December
    December and July
    In each case, cut between the tab and the pentagon down to the vertex of three pentagons.
  3. Fold along each side that is shared by two pentagons.
  4. Fold each tab along the common edge with a pentagon.
    Now that the folds have been made, you may assemble the calendar into a dodecahedron. The tabs are to be fastened to the underside of the nearest pentagon.
  5. You may fasten the tabs with glue, paste, tape, or what ever works best for you. The calendar shown in the project image above was fastened using hot glue from a glue gun.

2001 Calendar
2001 Calendar pattern

The order in which you fasten the sides together is left up to you; however, it is best to do it in such a manner that July is the last face to be fastened. The reason for this is that the July face has no tabs. There will be tabs on other faces that will be in position so that the July face is fastened down to those tabs.

You may find it very difficult to glue the calendar together neatly. Therefore, this alternative is provided. The calendar is to be made from 12 separate pieces (one for each month) and then assembled with the tabs external to the calendar. The resulting calendar will look like the one in the illustration at right.

Alternate Project Instructions

  1. Print the 12 calendar faces at right. You may choose any color card stock that you desire. You can use regular computer paper, but the result will not be as sturdy as card stock.
  2. Cut out each circle.
  3. Fold the 5 tabs on each face upwards.
  4. Glue each face tab to another face tab. The order in which you do this does not matter. However, it is suggested that you glue 6 faces together to form half of the calendar and another 6 faces to form the other half of the calendar. You will have two halves as illustrated below.

2001 Calendar halves

Let the glue dry thoroughly, and then glue the two halves together to form the calendar as shown in the project image.

Note that the calendar does not exhibit the year, 2001. This is deliberate. You can save this calendar and use it again for the years: 2007, 2018, 2029, 2035, and beyond, if the calendar survives that long.

2001 Calendar
2001 Calendar
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