Is it day or night in us now?

To determine whether it is day or night in the U.S. right now, you need to consider the time zone of the specific location within the country. The U.S. spans multiple time zones, from Eastern to Pacific, as well as Alaska and Hawaii. Depending on the current UTC time, it could be day in some areas while night in others. Checking the local time in a specific city will provide the exact answer.