lunartime.org

Coordinated Universal Time (UTC)

Coordinated Universal Time is the world's civil time scale. It follows International Atomic Time but is offset by whole leap seconds so that it stays close to Earth's rotation. Proposals for lunar time all require traceability to UTC.

Derived from
International Atomic TimeTAI
Sibling of
International Atomic TimeTAI
Sibling of
Coordinated Lunar TimeLTC

Other terms worth reading next.

All thirty entries are in the glossary of lunar timekeeping.

Where it appears

Primary documents that use the term.

  • OSTP Celestial Time Standardization memo (2024) [1]Official
  • IAU 2024 Resolution III: a coordinated lunar time [2]Official
  • CGPM 2026 Draft Resolution D on lunar time [3]Official

Articles on this site that use the term.

Sources

  1. Policy on Celestial Time Standardization — White House Office of Science and Technology Policy, . Official document. Verified .
  2. Resolution on the establishment of a coordinated lunar time standard by international agreement — International Astronomical Union, Commission A3 — XXXII General Assembly, . Official document. Verified .
  3. Convocation of the 28th meeting of the CGPM (O/Ref AK-CFA-2026-1001) — Bureau International des Poids et Mesures / CIPM, . Official document. Verified .

Last verified