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NIST UTC 2019 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 |
|---|---|---|
| 2019-12-22 | 58839 | 2.8 ns |
| 2019-12-12 | 58829 | 1.2 ns |
| 2019-12-02 | 58819 | 0.4 ns |
| 2019-11-22 | 58809 | 0.7 ns |
| 2019-11-12 | 58799 | 0.1 ns |
| 2019-11-02 | 58789 | 0.8 ns |
| 2019-10-23 | 58779 | 2.4 ns |
| 2019-10-13 | 58769 | 1.1 ns |
| 2019-10-03 | 58759 | 0.6 ns |
| 2019-09-23 | 58749 | 1.1 ns |
| 2019-09-13 | 58739 | 1 ns |
| 2019-09-03 | 58729 | 0.6 ns |
| 2019-08-24 | 58719 | 0.3 ns |
| 2019-08-14 | 58709 | -0.1 ns |
| 2019-08-04 | 58699 | -0.1 ns |
| 2019-07-25 | 58689 | 1.2 ns |
| 2019-07-15 | 58679 | 1.2 ns |
| 2019-07-05 | 58669 | 0.7 ns |
| 2019-06-25 | 58659 | -1.9 ns |
| 2019-06-15 | 58649 | -3.6 ns |
| 2019-06-05 | 58639 | -2.6 ns |
| 2019-05-26 | 58629 | -2.3 ns |
| 2019-05-16 | 58619 | -2.8 ns |
| 2019-05-06 | 58609 | -0.8 ns |
| 2019-04-26 | 58599 | 0.4 ns |
| 2019-04-16 | 58589 | 0.6 ns |
| 2019-04-06 | 58579 | -0.3 ns |
| 2019-03-27 | 58569 | -1.9 ns |
| 2019-03-17 | 58559 | -1 ns |
| 2019-03-07 | 58549 | 0.7 ns |
| 2019-02-25 | 58539 | -2.4 ns |
| 2019-02-15 | 58529 | -5.3 ns |
| 2019-02-05 | 58519 | -3.3 ns |
| 2019-01-26 | 58509 | -2.1 ns |
| 2019-01-16 | 58499 | -2.4 ns |
| 2019-01-06 | 58489 | -1.4 ns |
Created April 1, 2020, Updated December 22, 2025