| Event | National Constitution Day (Samvidhan Divas) |
| Date | 26 November |
| Purpose | Commemorates the adoption of the Constitution of India in 1949 |
| 2025 Significance | Marks 75 years since the adoption of the Constitution |
| Historical Context | Constitution adopted by the Constituent Assembly |
| Drafting Duration | 2 years, 11 months, 18 days |
| Key Figure | Dr. B.R. Ambedkar, Chairman of the Drafting Committee |
| Formal Declaration | Officially designated on 19 November 2015 |
| Pre-2015 Observance | Observed informally as Law Day |
| Key Values Emphasized | Justice, Liberty, Equality, Fraternity, Secularism, Democracy, Rule of Law |
| Primary Audience | Students, public servants, and citizens |
| Constitution Articles | 395 at adoption, 448 in 2025 |
| Constitution Length | Longest written constitution in the world |
| Number of Schedules | 12 |
| Related Observance | Republic Day on 26 January |
| Major Events | Formation of Constituent Assembly (9 December 1946) |
| First meeting of the Constituent Assembly (9 December 1946) |
| Election of Dr. Rajendra Prasad as President (11 December 1946) |
| Formation of Drafting Committee (29 August 1947) |
| Presentation of Draft Constitution (4 November 1948) |
| Adoption of Constitution (26 November 1949) |
| Constitution came into force (26 January 1950) |