Feedback on a local-time stock-market opening tool

What they need

An Ireland-based maker built a small website to show whether the US stock market is open without manually reconciling American and European clock changes. The post says it also handles extended sessions, holidays and early closes, and explicitly welcomes feedback from other users. The useful review focus is the clarity of local-time presentation and confusing edge cases. This is a software-feedback request, not an investment recommendation.

Roles and skills