If yesterday felt slightly longer than normal, dont be alarmed. You were correct.
Yesterday was the 30th June 2015 and it was officially 1 second longer than normal.
For the first time in three years an extra second was added to the official time set by atomic clocks.
The “leap second” means the last minute of June will have 61 seconds in it.
Leap seconds – and leap years – are added as basic ways to keep the clock in sync with the Earth and its seasons.
However, there are concerns the extra second could cause problems for some computer systems because it has to be added manually.
The addition will mean that the last minute of June will have 61 seconds; while 23:59:59 usually becomes 00:00:00, the leap second will ensure the time becomes 23:59:60.