DIFFERENCE BETWEEN INTERNATIONAL ATOMIC TIME (TAI) AND COORDINATED UNIVERSAL TIME (UTC) Date JD TAI - UTC 1961 JAN 1 2437300.5 1.4228180 s + (MJD - 37300.) x 0.001296 s 1961 AUG 1 2437512.5 1.3728180 s + (MJD - 37300.) x 0.001296 s 1962 JAN 1 2437665.5 1.8458580 s + (MJD - 37665.) x 0.0011232s 1963 NOV 1 2438334.5 1.9458580 s + (MJD - 37665.) x 0.0011232s 1964 JAN 1 2438395.5 3.2401300 s + (MJD - 38761.) x 0.001296 s 1964 APR 1 2438486.5 3.3401300 s + (MJD - 38761.) x 0.001296 s 1964 SEP 1 2438639.5 3.4401300 s + (MJD - 38761.) x 0.001296 s 1965 JAN 1 2438761.5 3.5401300 s + (MJD - 38761.) x 0.001296 s 1965 MAR 1 2438820.5 3.6401300 s + (MJD - 38761.) x 0.001296 s 1965 JUL 1 2438942.5 3.7401300 s + (MJD - 38761.) x 0.001296 s 1965 SEP 1 2439004.5 3.8401300 s + (MJD - 38761.) x 0.001296 s 1966 JAN 1 2439126.5 4.3131700 s + (MJD - 39126.) x 0.002592 s 1968 FEB 1 2439887.5 4.2131700 s + (MJD - 39126.) x 0.002592 s 1972 JAN 1 2441317.5 10.0 s + (MJD - 41317.) x 0.0 s 1972 JUL 1 2441499.5 11.0 s + (MJD - 41317.) x 0.0 s 1973 JAN 1 2441683.5 12.0 s + (MJD - 41317.) x 0.0 s 1974 JAN 1 2442048.5 13.0 s + (MJD - 41317.) x 0.0 s 1975 JAN 1 2442413.5 14.0 s + (MJD - 41317.) x 0.0 s 1976 JAN 1 2442778.5 15.0 s + (MJD - 41317.) x 0.0 s 1977 JAN 1 2443144.5 16.0 s + (MJD - 41317.) x 0.0 s 1978 JAN 1 2443509.5 17.0 s + (MJD - 41317.) x 0.0 s 1979 JAN 1 2443874.5 18.0 s + (MJD - 41317.) x 0.0 s 1980 JAN 1 2444239.5 19.0 s + (MJD - 41317.) x 0.0 s 1981 JUL 1 2444786.5 20.0 s + (MJD - 41317.) x 0.0 s 1982 JUL 1 2445151.5 21.0 s + (MJD - 41317.) x 0.0 s 1983 JUL 1 2445516.5 22.0 s + (MJD - 41317.) x 0.0 s 1985 JUL 1 2446247.5 23.0 s + (MJD - 41317.) x 0.0 s 1988 JAN 1 2447161.5 24.0 s + (MJD - 41317.) x 0.0 s 1990 JAN 1 2447892.5 25.0 s + (MJD - 41317.) x 0.0 s 1991 JAN 1 2448257.5 26.0 s + (MJD - 41317.) x 0.0 s 1992 JUL 1 2448804.5 27.0 s + (MJD - 41317.) x 0.0 s 1993 JUL 1 2449169.5 28.0 s + (MJD - 41317.) x 0.0 s 1994 JUL 1 2449534.5 29.0 s + (MJD - 41317.) x 0.0 s 1996 JAN 1 2450083.5 30.0 s + (MJD - 41317.) x 0.0 s