UTC5UTC4

UTC5UTC4 is not an official timekeeping designation. In informal or experimental contexts, it is sometimes used to describe a dual-offset concept that would involve two simultaneous Coordinated Universal Time offsets, UTC+05:00 and UTC+04:00, rather than a single offset for a geographical region.

The term has appeared in discussions about cross-border scheduling, data formats, and system design as a placeholder or hypothetical construct to explore how software could handle events that may be anchored to more than one offset. It is not used by the IANA time zone database or any recognized international standard.

In practical terms, real-world timekeeping uses a single offset for a given location at any moment, with possible daylight saving adjustments defined by country or region. A dual-offset label like UTC5UTC4 would require explicit rules to resolve which offset applies when and for which region. Without a formal standard, implementations would vary and could lead to confusion if treated as a real time zone.

Potential use cases include planning across teams in different zones, displaying both local times in a merged interface, or testing how applications handle ambiguous or changing time data. As a concept, UTC5UTC4 serves more as a thought experiment or design placeholder than a recognized timekeeping system.

See also: time zone, UTC offset, daylight saving time, IANA time zone database.