Clocks on the moon tick differently than on Earth
The moon's weaker gravity creates a time dilation effect, causing clocks there to tick ever so slightly faster than their counterparts on Earth. This discrepancy, though minuscule on an individual basis, becomes significant when considering the long-term precision required for lunar missions. To address this challenge, NASA and the European Space Agency are partnering to develop a standardized lunar time zone as part of the Artemis program.
This unified system will be critical for coordinating schedules, communications, and scientific endeavors among various space agencies and future lunar residents. Establishing lunar time involves accounting for the Moon's distinct gravitational influence, which affects the rate at which clocks tick at a different pace than on Earth. Additionally, the system will need to ensure seamless compatibility with Earth-based timekeeping systems to facilitate communication and data exchange between lunar outposts and mission control centers back on Earth.
https://www.cnn.com/2024/05/30/science/lunar-time-zone-scale-nasa-artemis-scn/index.html
