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NIST UTC 2023 Archive
UTC - UTC (NIST)
The deviation of UTC(NIST) from UTC has been less than +/-100 ns since July 6, 1994. The table below shows values of UTC - UTC(NIST) as supplied by the BIPM Circular T for the most recent period in which data are available.
UTC - UTC(NIST)Values (at 10-day intervals)
| Date | MJD | UTC-UTC(NIST) ns |
|---|---|---|
| Dec. 31, 2023 | 60309 | -0.8 |
| Dec. 21, 2023 | 60299 | -1.0 |
| Dec. 11, 2023 | 60289 | 1.2 |
| Dec. 1, 2023 | 60279 | 0.0 |
| Nov. 21, 2023 | 60269 | -1.0 |
| Nov. 11, 2023 | 60259 | -0.6 |
| Nov. 1, 2023 | 60249 | 0.2 |
| Oct. 22. 2023 | 60239 | 1.6 |
| Oct. 12, 2023 | 60229 | 1.9 |
| Oct. 2, 2023 | 60219 | 1.7 |
| Sep. 22, 2023 | 60209 | 0.5 |
| Sep. 12, 2023 | 60199 | 0.1 |
| Sep. 2, 2023 | 60189 | 0.0 |
| Aug. 23, 2023 | 60179 | -0.7 |
| Aug. 13, 2023 | 60169 | -0.7 |
| Aug. 3, 2023 | 60159 | 0.8 |
| Jul. 24, 2023 | 60149 | 0.8 |
| Jul. 14, 2023 | 60139 | 0.8 |
| Jul. 4, 2023 | 60129 | -0.2 |
| Jun. 24, 2023 | 60119 | -0.8 |
| Jun. 14, 2023 | 60109 | -0.5 |
| Jun. 4, 2023 | 60099 | -0.6 |
| May 25, 2023 | 60089 | -2.0 |
| May 15, 2023 | 60079 | -2.2 |
| May 5, 2023 | 60069 | -0.8 |
| Apr. 25, 2023 | 60059 | 0.9 |
| Apr. 15, 2023 | 60049 | 1.8 |
| Apr. 5, 2023 | 60039 | 1.6 |
| Mar. 26, 2023 | 60029 | 0.1 |
| Mar. 16, 2023 | 60019 | -0.3 |
| Mar. 6, 2023 | 60009 | -1.1 |
| Feb. 24, 2023 | 59999 | -2.0 |
| Feb. 14, 2023 | 59989 | -1.5 |
| Feb. 4, 2023 | 59979 | 0.7 |
| Jan. 25, 2023 | 59969 | 1.6 |
| Jan. 15, 2023 | 59959 | 1.6 |
| Jan. 5, 2023 | 59949 | 0.8 |
Created June 7, 2024, Updated January 2, 2026