At night the clocks will add a second – Onet.pl

Nearest night, just before 2:00 our time, world clocks will add one second to the usual 24 hour day. This so-called leap second must be taken into account once every few years to measure the time on Earth was accurate.

Traditionally it is assumed that evenly day has 24 hours 86400 seconds. In fact, the rotation of the planet around its axis is on average 0.002 seconds slower. Once every few years, so you’ll need to add to the day one second. This happens irregularly, because the Earth once slows down and speeds up the time.

Since this can not be precisely predict in the long term, adding leap seconds are announced with only six months in advance. According to experts, some glitches are possible unprepared computers, websites or electronic – just like last time, in 2012. In this century leap second added three times.

(bp)