dualtime

Dualtime refers to the practice or system of presenting or recording two distinct representations of time within a single interface or data stream. Typically, these representations are two clocks that run concurrently, often corresponding to different time zones or different timekeeping schemes (such as local time and Coordinated Universal Time).

In software and user interfaces, dualtime allows users to plan across time zones, coordinate meetings, and track events with context from multiple horizons. In computing, the term is also used to describe logs or events captured with dual timestamps, for example wall-clock time alongside a monotonic clock to measure elapsed durations.

Implementation considerations include consistent formatting of the two times (e.g., ISO 8601), handling daylight saving transitions, and avoiding confusion when crossing date boundaries. Design choices include whether to freeze one clock during edits, how to label the time zones, and how to synchronize the two representations when the underlying time data changes.

Dualtime is not a widely standardized term and its usage varies among domains. It is mainly found in discussions of global collaboration tools, timekeeping interfaces, and logging practices. See also: dual clock, multiple time zone support, dual timestamps, time synchronization.