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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
2012-12-28
56289
-9.5
2012-12-18
56279
-6.6
2012-12-08
56269
-4.7
2012-11-28
56259
-3.1
2012-11-18
56249
-1.3
2012-11-08
56239
-1.4
2012-10-29
56229
0.5
2012-10-19
56219
2.5
2012-10-09
56209
2.8
2012-09-29
56199
2.9
2012-09-19
56189
3.9
2012-09-09
56179
3.3
2012-08-30
56169
2.8
2012-08-20
56159
2.7
2012-08-10
56149
2.8
2012-07-31
56139
2.3
2012-07-21
56129
2.9
2012-07-11
56119
3.5
2012-07-01
56109
4.8
2012-06-21
56099
5.5
2012-06-11
56089
7.8
2012-06-01
56079
9.3
2012-05-22
56069
10.2
2012-05-12
56059
9.1
2012-05-02
56049
7.0
2012-04-22
56039
4.1
2012-04-12
56029
0.9
2012-04-02
56019
-0.6
2012-03-23
56009
-1.9
2012-03-13
55999
-2.3
2012-03-03
55989
-3.4
2012-02-22
55979
-4.7
2012-02-12
55969
-2.7
2012-02-02
55959
-0.8
2012-01-23
55949
1.4
2012-01-13
55939
2.7
2012-01-03
55929
4.5