Teachers Day is, interestingly, not observed on the same day all over the world. It is perhaps one of those few days which has a separate international day whose importance is superseded by the nationally observed day.
Taking a look at Teachers Day as it is celebrated across the world, in some countries it is marked by a holiday, in others it is a working day.
International Teachers Day as observed by UNESCO is October 5. Being held ever since 1994, it commemorates teachers' organisations worldwide. Its aim is to mobilise support for teachers and to ensure that the needs of future generations will continue to be met by teachers.
China -Teachers Day was founded at the National Central University in 1931. It was adopted by the central government of the Republic of China, in 1932. In 1939, the day was set for August 27, Confucius' birthday. The People's Republic of China government abrogated it in 1951. It was reestablished in 1985, and the day was changed to September 10. Now more and more people are trying to revert the day back to Confucius's birthday.
The US- In the US, Teachers Day is a non-official holiday. It is observed on the Tuesday of the first full week of May. The day is celebrated with pomp and gaiety. A number of activities are organised in schools to honour teachers. The celebrations can continue for the entire week of May.
Thailand- In Thailand, National Teachers Day is celebrated every year on January 16. The day was adopted as Teachers Day in the island nation by a resolution of the government on November 21, 1956. The first Teachers Day was held in 1957. The day is declared as a holiday in schools.
Iran- In Iran, Teachers Day is celebrated on May 2. It commemorates the assassination of Iranian professor Ayatollah Morteza Motahhari. The renowned writer, a timeless teacher, was executed on May 2, 1980. On the day, students offer flowers to teachers to honour the sacred profession.