Traefik Proxy Headers middleware and downstream services time zone header interoperability

Traefik provides Headers middleware for manipulating request metadata, but it lacks native logic for date-time arithmetic or regional time zone conversion. When integrating Traefik with distributed microservices, the proxy cannot natively calculate offsets or transform timestamps into regional formats based on the system clock.

The goal is to ensure downstream services receive a standardized timestamp or a regional offset header without requiring each application to implement complex timezone logic independently. The core engine does not provide built-in date-time transformation, so there is no native mechanism to inject a current UTC offset dynamically during the request lifecycle.

Can a custom Go plugin perform date-time calculations and inject them into headers without introducing significant latency? Is there a recommended pattern for passing regional-specific metadata through Traefik when the application layer requires dynamic timezone offsets?