India's New Time Rules Create Ambiguity for Storing UTC Timestamps

New regulations in India, the "Legal Metrology (Indian Standard Time) Rules, 2026," have introduced uncertainty for businesses regarding the continued use of Coordinated Universal Time (UTC) for timestamps.

Rule 7 of these regulations states that "no entity shall use, display or record any time reference other than Indian Standard Time (IST) for all purposes." The inclusion of the word "record" raises concerns that it could literally prohibit the use of UTC timestamps in databases and system logs, even if local time is only applied at the point of display.

The rules, set to take effect in late February 2027, require all legal, administrative, and official documents to reference time in IST. While the Indian Space Research Organisation (ISRO) and CSIR-National Physical Laboratory (CSIR-NPL) maintain and disseminate IST, which is based on UTC, companies are now responsible for ensuring the accuracy, stability, and traceability of their time data to the national standard.

Furthermore, the regulations restrict the use of timekeeping devices based on Global Navigation Satellite Systems (GNSS). They mandate that at least one timing reference must be received directly from India's NavIC constellation or another authorized source, excluding GPS from the list of permitted sources. Critical infrastructure sectors, including telecommunications and financial services, will also require redundancy and the ability to maintain uninterrupted timing in case of a primary source failure, potentially necessitating the adoption of atomic clocks or similar technologies.