Timekeeping standards are established systems that define how time is measured and recorded. These standards ensure consistency and accuracy in timekeeping across different regions and industries. For example, the International System of Units (SI) defines the second as the base unit of time, which is based on the vibrations of a specific atom. Various organizations, such as the International Telecommunication Union (ITU) and the National Institute of Standards and Technology (NIST), help maintain these standards. They provide guidelines for time synchronization, which is crucial for technologies like GPS and telecommunications, ensuring that devices and systems operate in harmony.