When Delhi officially became the capital of British India, the Viceroy was Lord Hardinge. The decision to shift the capital from Calcutta to Delhi was announced by King George V during the Delhi Durbar on December 12, 1911, which took place during Lord Hardinge's tenure as Viceroy (1910-1916)

. However, the inauguration of New Delhi as the new capital was done later, on February 13, 1931, by Lord Irwin, who was the Viceroy at that time (1926-1931)

. In summary:

• The capital was officially shifted from Calcutta to Delhi in 1911 under Viceroy Lord Hardinge.
• The new city of New Delhi was inaugurated as the capital in 1931 by Viceroy Lord Irwin.