Rennet, it doesn’t matter on any large scale. It’s just that people who are talking to each other on different continents often end up having that conversation again and again, so it’s here for reference. There’s no necessity to add where you are. We’re not gradually harvesting all your information.
Sorry that was my (failed) attempt at being facetious and Boo I have not managed to sell a single tee-shirt or mug. Or was it Dan who mentioned the tee-shirts somewhere else - I am losing my mind - it must be jet lag.
another fine source of information regarding “official” United States time which give a map of the world and where it is dark and light with respect to your location is here: Official U.S. Time