Knockout computed observables interoperability with regional time zone handling

The goal is to determine how Knockout computed observables should maintain dependency tracking when their source values undergo regional time zone conversion, ensuring that UI updates remain consistent across locales without manual subscription management.

Computed observables automatically track dependencies on observed values and re-evaluate when any dependent changes, but introducing time zone–aware date objects or locale‑specific formatting may interrupt the dependency chain. The uncertainty centers on whether Knockout's internal dependency detection correctly observes a Date object after its time zone offset is normalized, and how extenders or wrappers can normalize values without breaking the reactive graph or incurring unnecessary re-evaluation. Additionally, performance considerations arise when computed depend on frequently changing time‑sensitive data in highly interactive interfaces.

Does the computed observable re-evaluate when a Date’s getTime() value changes after regional offset adjustment? What is the recommended pattern to wrap a timezone-aware Date in an observable while preserving automatic dependency tracking? Can computed extenders safely intercept locale‑normalized values without introducing circular dependency risks or evaluation overhead?