McClellan Announces Advancement of the Celestial Time Standardization Act Out of Committee

Washington, D.C. – On National Space Day, Congresswoman Jennifer McClellan (VA-04) announced that her Celestial Time Standardization Act advanced unanimously out of the House Science, Space and Technology Committee earlier this week. McClellan’s bill now proceeds to the House floor to be voted on by all members of Congress.

H.R. 2313, the Celestial Time Standardization Act, directs the National Aeronautics and Space Administration (NASA) to establish a time standard for the Moon and other celestial bodies. 

The current timing discrepancy among different celestial bodies caused by differences in gravity and other factors can present challenges for precision navigation, space situational awareness and other operations under the current Coordinated Universal Time (UTC) used to standardize and synchronize timing on Earth.  

“I’m excited to see my Celestial Time Standardization Act advanced out of the Science, Space and Technology Committee with bi-partisan support,” said Congresswoman McClellan. “The differences between the standard of time used for space exploration today and time on other celestial bodies could make a critical difference when synchronizing between NASA, commercial entities and international partners as we explore Mars and beyond. To maintain U.S. leadership in this new era of space exploration, I will continue to advocate for a celestial time standard that will allow us to safely and precisely expand our knowledge of the known universe.”

McClellan introduced the Celestial Time Standardization Act in the 118th Congress. The bill passed the House with bipartisan support as part of the 2024 NASA Reauthorization Act, which stalled in the Senate. The Senate Commerce Committee's NASA Transition Authorization Act introduced on March 11, 2025 includes the Celestial Time Standardization Act. 

Read the full bill text for H.R. 2313. Read the one-pager for H.R. 2313 here.