Legislating the Nanosecond- India's "One Nation, One Time" Initiative and the Institutionalisation of Indian Standard Time as Critical Digital Infrastructure

Abstract

Time is the unstated base of all digital transactions, but until recently was not legally recognised in India. Indian Standard Time (IST) has been in use since 1906 and till now, various banks, telecom networks, stock exchanges, and government systems used to sync their internal clocks to various sources, some of which are beyond the country's control. IST is the single time reference for all legal, administrative, commercial, and digital applications, formalised through the Legal Metrology Indian Standard Time Rules, 2026, under the “One Nation One Time” initiative, which is precisely synchronised and maintained by CSIR-NPL. This review article looks at the scientific underpinning of the initiative, its dissemination structure, and the regulatory framework, based on official notifications, laboratory publications, and policy commentary. It describes at the micro level the need for synchronisation at the nanosecond level for financial markets, telecom sector, power grids and cybersecurity, and it discusses the impact of the initiative on digital sovereignty, economic growth, and citizens daily lives. The article also outlines current gaps such as compliance requirements for smaller institutions, interoperability with international timekeeping systems and the lack of public awareness. The results indicate that legally traceable time is a new type of national digital infrastructure, which is important for the current and future generations.