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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
2013-12-23
56649
-2.6
2013-12-13
56639
-4.6
2013-12-03
56629
-5.1
2013-11-23
56619
-5.9
2013-11-13
56609
-4.8
2013-11-03
56599
-2.8
2013-10-24
56589
1.1
2013-10-14
56579
3.8
2013-10-04
56569
6.9
2013-09-24
56559
10.9
2013-09-14
56549
13.1
2013-09-04
56539
13.9
2013-08-25
56529
14.0
2013-08-15
56519
14.5
2013-08-05
56509
14.6
2013-07-26
56499
14.4
2013-07-16
56489
14.0
2013-07-06
56479
13.5
2013-06-26
56469
12.3
2013-06-16
56459
9.8
2013-06-06
56449
7.9
2013-05-27
56439
6.4
2013-05-17
56429
4.3
2013-05-07
56419
-0.6
2013-04-27
56409
-4.8
2013-04-17
56399
-8.9
2013-04-07
56389
-11.9
2013-03-28
56379
-14.4
2013-03-18
56369
-16.5
2013-03-08
56359
-17.9
2013-02-26
56349
-18.5
2013-02-16
56339
-20.2
2013-02-06
56329
-19.0
2013-01-27
56319
-16.8
2013-01-17
56309
-14.8
2013-01-07
56299
-11.8