Wooden eternal calendar, teaching aid
The year of production: the ninetieth of the 20th century
Dimensions: 59 x 28.5 cm
Donor: Special Boarding School in Spišské Vlachy
This teaching aid was made by educators from Special Boarding School in Spišské Vlachy, the current United Boarding School (since 1.1. 2011).
The wooden calendar consists of 3 movable wheels with different diameters on which there’s written: days of the week, months, numbers from 1 to 31. The students could set current date, month and day of the week by turning the wheels (without year).
They could use the calendar for a long time no matter the year.