a large majority of countries celebrate the day sometime in october, with the 5th eventually being chosen as world teacher's day.

brazil is unique in the fact that the date selected to celebrate is actually steeped in history.

the 15th of october was the day that emperor dom pedro i institutionalized and created elementary schools for the poorer people of the country - however, it was not until the late 1940s that the first teacher's day was celebrated in the country and another 15 years before it was declared to be a holiday.