The oath-taking ceremony of the Ministers of the newly formed Central Ministry…

Concept: Under Article 75 of the Constitution of India, the Prime Minister and the other Members of the Union Council of Ministers are appointed by the President and hold office during the President's pleasure; the oath of office and of secrecy is administered by the President under Article 75(4) at a formal ceremony.

Application: The results of the 2014 Lok Sabha elections were announced on 16 May 2014. The BJP-led NDA's Parliamentary Party elected Narendra Modi as its leader on 20 May 2014, and he called on the President on 21 May 2014 to formally stake his claim to form the government. After the composition of the ministry was finalised, the President administered the oath of office and of secrecy to Narendra Modi and the first batch of the Union Council of Ministers at a ceremony held at Rashtrapati Bhavan on 26th May, 2014.

Cross-check: Official records of the President of India's Secretariat, as well as contemporary national press coverage, confirm 26th May, 2014 as the date of this oath-taking ceremony. The other nearby dates in that fortnight belong to the preceding claim-staking and government-formation process, not to the oath ceremony itself.