Teachers of Brunei annually accept congratulations on Teachers' Day on September 23. This holiday was established in Brunei to commemorate the birth of the ruler Sultan Omar Ali Saifuddien III.

Sultan Omar Ali Saifuddien III was the 28th ruler of Brunei. He was born on September 23, 1914 and succeeded the throne in 1950 after death of his elder brother, who left no male heirs.

Omar Ali Saifuddien III is often called the Architect of Modern Brunei for paying importance to education of his subjects. He introduced number of reforms, that guaranteed the citizens nominal fees for attending schools, thus making education in Brunei accessible even to the poorest people. He also offered religious scholarships to students with potential to continue their higher education overseas.

Omar Ali Saifuddien III died in 1986 and he was succeeded by his eldest son Hassanal Bolkiah. He followed father's policy and even expanded it further. He founded and built number of institutions and provided scholarships for study in Brunei and abroad.

Various events and activities are held on Teachers' Day. Teachers are presented with the Guru Berjasa, Teachers Day and Excellent Teacher awards in recognition of their excellent service. Festive events may be postponed to another day due to the fasting.