What is ‘One Nation, One Time’? How it works?
The government said that the need for a common time reference has increased with the growing use of digital and technology-based systems
The "One Nation, One Time" initiative, officially known as the Legal Metrology (Indian Standard Time) Rules, 2026, aims to make Indian Standard Time (IST) the single reference time for all legal, administrative, commercial, and official purposes across India. The rules came into effect on August 27, 2026, with a 180-day transition period allowing various sectors to adjust their systems accordingly.
The government's concern for a unified time reference stems from the reliance of digital and technological systems on accurate timekeeping, where discrepancies can disrupt coordination and record-keeping. By standardizing on IST, the government seeks to ensure precise time-stamping of transactions, enhance the reliability of transport systems, facilitate secure communication and internet networks, and maintain the accuracy of power systems and government records.
The initiative also aims to reduce dependence on foreign time sources such as GPS, thereby safeguarding critical infrastructure against cyber threats and data manipulation. The Rules were drafted in response to the National Physical Laboratory's (NPL) efforts, which have been disseminating IST with millisecond to microsecond accuracy since 2025.
NPL collaborates with ISRO to ensure IST's traceability to Coordinated Universal Time (UTC) with an uncertainty of less than 3 nanoseconds. A significant milestone includes the establishment of a White Rabbit Technology-based IST Dissemination Demonstration Network in Bengaluru, designed to bolster the nation's digital infrastructure by minimizing reliance on foreign time sources and providing enhanced security for sectors like finance, telecommunications, and power grids.
Written by urgent.news from The Hindu's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
