Time signals are standardized broadcasts that provide accurate time information to synchronize clocks and devices. These signals can be transmitted through various mediums, including radio waves, satellite systems, and the internet. They are essential for applications like navigation, telecommunications, and scientific research, ensuring that timekeeping is consistent across different regions. One well-known source of time signals is the National Institute of Standards and Technology (NIST) in the United States, which broadcasts time information via radio. Additionally, the Global Positioning System (GPS) provides precise time data, allowing users to maintain accurate time across the globe.