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NIST Time Scale Data Archive

Updated monthly

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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
2004-12-30	53369	3.5
2004-12-20	53359	4.2
2004-12-10	53349	5.1
2004-11-30	53339	4.7
2004-11-20	53329	2.5
2004-11-10	53319	2.6
2004-10-31	53309	3.4
2004-10-21	53299	1.4
2004-10-11	53289	3.7
2004-10-01	53279	3.5
2004-09-21	53269	4.1
2004-09-11	53259	4.7
2004-09-01	53249	2.5
2004-08-22	53239	0.9
2004-08-12	53229	-2.5
2004-08-02	53219	-2.5
2004-07-23	53209	-4.0
2004-07-13	53199	-6.0
2004-07-03	53189	-5.3
2004-06-23	53179	-6.4
2004-06-13	53169	-5.2
2004-06-03	53159	0.2
2004-05-24	53149	5.4
2004-05-14	53139	9.9
2004-05-04	53129	10.5
2004-04-24	53119	7.5
2004-04-14	53109	6.9
2004-04-04	53099	6.7
2004-03-25	53089	6.3
2004-03-15	53079	4.1
2004-03-05	53069	3.2
2004-02-24	53059	1.2
2004-02-14	53049	-2.0
2004-02-04	53039	-4.5
2004-01-25	53029	-4.6
2004-01-15	53019	-4.2
2004-01-05	53009	-3.6