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New Delhi, 30 August 2026: Department of Consumer Affairs has notified the Legal Metrology (Indian Standard Time) Rules, 2026, making Indian Standard Time (IST) the common time reference for legal, administrative, commercial and other official purposes across India.
Rules were notified on August 27, 2026, and will come into force 180 days after their publication in the Official Gazette. The transition period is intended to give government departments, businesses and institutions time to make necessary changes to their systems.
Move comes as accurate time synchronisation has become increasingly important for digital and technology-driven services. Banking and digital payments, telecommunications, railways, power systems, computer networks and government records all rely on precise timestamps. Differences between time sources can affect the coordination and recording of transactions and other time-sensitive activities.
What will the new IST rules support?
Common time reference is expected to help ensure:
- Accurate timestamping of banking and digital payment transactions
- Better coordination of railways, airports and transport systems
- Reliable operation of telecommunication and internet networks
- Accurate timekeeping in power systems
- Consistent government and legal records
- Better coordination of emergency and other time-sensitive services
NavIC and Indian timing sources
Government is developing infrastructure to disseminate accurate IST through Indian institutions and Legal Metrology laboratories. Rules also provide for the use of NavIC, India's satellite navigation system, along with other approved Indian timing sources for secure and reliable time dissemination.
Initiative could provide an Indian alternative for critical systems that currently depend on foreign satellite-based timing sources.
White Rabbit network demonstrated in Bengaluru
As part of the ‘One Nation, One Time’ initiative, a White Rabbit Technology-based Indian Standard Time Dissemination Demonstration Network was commissioned at the Regional Reference Standard Laboratory (RRSL), Bengaluru, in July 2026.
System has demonstrated the dissemination of IST for sectors such as banking, telecommunications, power, transportation and digital governance. IST dissemination between RRSL Bengaluru and NSE Chennai has also been demonstrated in collaboration with CSIR-NPL, ISRO, SEBI, NSE, BSNL and other stakeholders.
What happens next?
180-day transition period will allow organisations to review their existing time-synchronisation systems, make technical changes and prepare for compliance. Broader objective is to establish one accurate and consistent Indian Standard Time reference for time-dependent systems and official activities across the country.
Keywords
Indian Standard Time Rules 2026, One Nation One Time, IST India, Legal Metrology Rules 2026, NavIC timing, White Rabbit technology, Citizen News Puttur