Lord Chelmsford served as the Viceroy of India from 1916 to 1921, a period marked by significant events such as the Jallianwala Bagh Massacre and the passage of the Rowlatt Act.

Darul Uloom Deoband was founded by Hazrat Haji Aabid Hussain, Maulana Muhammad Qasim Nanotavi, and Maulana Zul Faqgar Ali.

Sindh was separated from the Bombay Presidency on August 1, 1936, as a result of the Indian Act of 1935 which was passed by the British Parliament.

Sir William Muir, a Scottish Orientalist scholar, authored "The Life of Muhammad." He was a colonial administrator.

India's first census was carried out on Mayo's orders.

Womesh Chunder Bonnerjee presided over the first session of the Indian National Congress, held in Bombay in 1885. The session was attended by 72 members.

The Brahmo Samaj was founded by Rammohun Roy in 1828. It was a social-religious reform movement that aimed to promote monotheism and challenge traditional Hindu practices. It aimed to promote universal worship.

Hujjatullah-il-Baligha (The Conclusive Argument of God) is a seminal work of Islamic thought written by Shah Waliullah Dehlawi. This work is considered a synthesis of the Islamic intellectual disciplines authoritative in the 18th century.

The major excavation and recognition of Mohenjo-daro and Harappa as significant sites of the Indus Valley Civilization occurred in the 1920s. These discoveries provided crucial insights into one of the world's earliest urban societies. The sites were excavated by archeologists and they revealed the existance of long forgotten cities.

 The 1973 Constitution took effect on Pakistan’s Independence Day, enshrining parliamentary democracy and federal structure.