SIVASAGAR, Nov 27: The Sivasagar district administration observed Constitution Day by organizing a programme at the Syukafa Conference Hall in the office of the Deputy Commissioner here on Monday. Since November 26 was a holiday (Sunday), the day was observed today. The Constitution Day is observed to celebrate the adoption of the Indian Constitution by the Constituent Assembly on November 26, 1949, which came into force on January 26, 1950.