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Physical Measurement Laboratory / Time and Frequency Division

Time Realization and Distribution Group

NIST UTC 2020 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
2020-12-26	59209	-0.7 ns
2020-12-16	59199	-0.7 ns
2020-12-06	59189	-0.9 ns
2020-11-26	59179	0 ns
2020-11-16	59169	1.0 ns
2020-11-06	59159	1.2 ns
2020-10-27	59149	1.3 ns
2020-10-17	59139	0.3 ns
2020-10-07	59129	0.8 ns
2020-09-27	59119	1.4 ns
2020-09-17	59019	0.3 ns
2020-09-07	59099	-0.7 ns
2020-08-28	59089	-0.9 ns
2020-08-18	59079	-0.6 ns
2020-08-08	59069	-0.3 ns
2020-07-29	59059	0 ns
2020-07-19	59049	-0.4 ns
2020-07-09	59039	0.2 ns
2020-06-29	59029	0.5 ns
2020-06-19	59019	-0.5 ns
2020-06-09	59009	-2.3 ns
2020-05-30	58999	-2.4 ns
2020-05-20	58989	-2.4 ns
2020-05-10	58979	-2.3 ns
2020-04-30	58969	-1.7 ns
2020-04-20	58959	-1.1 ns
2020-04-10	58949	-0.7 ns
2020-03-31	58939	-1 ns
2020-03-21	58929	-0.7 ns
2020-03-11	58919	0.1 ns
2020-03-01	58909	0.1 ns
2020-02-20	58899	1.5 ns
2020-02-10	58889	2.2 ns
2020-01-31	58879	1.5 ns
2020-01-21	58869	0.6 ns
2020-01-11	58859	-2 ns
2020-01-01	58849	-0.8 ns

Time and frequency

Created January 19, 2021