Leap for Leap Seconds! Since today marks the occasion of the 26th leap second ever to occur, your challenge will be to output the date and time of every leap second in GMT or UTC that has occurred so far, as well as the one to occur today.

Input

There is no input.

Output

1972-06-30 23:59:60
1972-12-31 23:59:60
1973-12-31 23:59:60
1974-12-31 23:59:60
1975-12-31 23:59:60
1976-12-31 23:59:60
1977-12-31 23:59:60
1978-12-31 23:59:60
1979-12-31 23:59:60
1981-06-30 23:59:60
1982-06-30 23:59:60
1983-06-30 23:59:60
1985-06-30 23:59:60
1987-12-31 23:59:60
1989-12-31 23:59:60
1990-12-31 23:59:60
1992-06-30 23:59:60
1993-06-30 23:59:60
1994-06-30 23:59:60
1995-12-31 23:59:60
1997-06-30 23:59:60
1998-12-31 23:59:60
2005-12-31 23:59:60
2008-12-31 23:59:60
2012-06-30 23:59:60
2015-06-30 23:59:60


Rules

Since I doubt there are many built-ins that allow leap-seconds, I'll allow them.

Standard loopholes are disallowed.

Shortest code wins.

Date format must have a zero-padded month and a 4-digit year, as well as military time and a space separating the time from the date. Putting UTC at the end is optional. Your choice of dashes or slashes.

EDIT: Yep as predicted, this became an encoding challenge. If only encoding could fix the leap second problem, ...then all our code would be much more practical. Maybe we need some ideas for more fun challenges with practical uses?
R, 78 75 bytes

Built-ins, you say? Well...



message(paste(as.Date(.leap.seconds)-1,"23:59:60\n"),"2015-06-30 23:59:60")


R has an automatic variable .leap.seconds which contains the date and time of each leap second insertion, given in the system's local time. As of R version 3.2.0, this does not include today, so I've added that manually.

Ungolfed + explanation:

# Convert the datetime values to UTC dates. These will be a day past the
# expected output, so we can subtract 1 to get what we want.
dates &lt;- as.Date(.leap.second) - 1

# Paste the UTC time and a newline onto the end of each date
datetimes &lt;- paste(dates, "23:59:60\n")

# Print each time, including today, on its own line
message(datetimes, "2015-06-30 23:59:60")


You can try it online!