leapsecs.txt

   1 +1972-06-30
   2 +1972-12-31
   3 +1973-12-31
   4 +1974-12-31
   5 +1975-12-31
   6 +1976-12-31
   7 +1977-12-31
   8 +1978-12-31
   9 +1979-12-31
  10 +1981-06-30
  11 +1982-06-30
  12 +1983-06-30
  13 +1985-06-30
  14 +1987-12-31
  15 +1989-12-31
  16 +1990-12-31
  17 +1992-06-30
  18 +1993-06-30
  19 +1994-06-30
  20 +1995-12-31
  21 +1997-06-30
  22 +1998-12-31
  23 +2005-12-31
  24 +2008-12-31
  25 +2012-06-30
  26 +2015-06-30
  27 +2016-12-31