New Delhi, Sep 3: The government has taken a major step towards creating a common national time system by notifying the Legal Metrology (Indian Standard Time) Rules, 2026.
The new framework seeks to make Indian Standard Time (IST) the legally recognised and traceable time reference for systems and services operating across the country. It forms part of the government’s broader “One Nation, One Time” initiative aimed at improving time synchronisation across India’s growing digital and critical infrastructure.
The rules will come into effect 180 days after being published in the Official Gazette.
A reliable common time standard is increasingly important as more essential services depend on digital networks. Telecommunications, banking and digital payments, electricity grids, transportation, data centres and government platforms all require accurate time stamps to ensure that transactions and operations are recorded and coordinated correctly.
The initiative is also expected to strengthen cybersecurity. Precise time records can help security teams connect events occurring across different systems, making it easier to detect, investigate and respond to cyber incidents.
To ensure that IST can be reliably accessed across the country, CSIR-National Physical Laboratory (CSIR-NPL), ISRO and the Department of Legal Metrology have developed a network of secondary time references at five Regional Reference Standard Laboratories in Ahmedabad, Bengaluru, Bhubaneswar, Faridabad and Guwahati.
These regional facilities are linked to the national time standard maintained by CSIR-NPL, creating a distributed system for delivering accurate and traceable time across different regions.
The national time standard can be delivered through internet-based technologies such as Network Time Protocol (NTP) and Precision Time Protocol (PTP), as well as satellite-based systems including NavIC. Advanced fibre-based technology such as White Rabbit is also being tested for applications that require extremely precise timing.
The framework is designed to cater to a wide range of requirements, from regular information and communication technology systems to highly specialised operations where precise time and frequency synchronisation are essential.
Under the new rules, the Legal Metrology Department of the Ministry of Consumer Affairs will be responsible for regulatory and enforcement matters. CSIR-NPL, India’s National Metrology Institute, will provide the scientific foundation and maintain traceability for IST.
The government expects the initiative to improve coordination among critical sectors, strengthen digital infrastructure and create a more reliable and secure foundation for India’s increasingly technology-driven economy.