Coordinated Universal Time (UTC) follows TAI (see below) exactly except for an integral number of seconds,
presently 33. These leap seconds are inserted on
the advice of the International Earth Rotation Service (IERS) to ensure
that, on average over the years, the Sun is overhead within
International Atomic Time (TAI) is calculated by the BIPM from the readings of more than 200 atomic clocks
located in metrology institutes and observatories in more than 30 countries around the world. TAI is made available every
month in the BIPM Circular T. We estimate that TAI does not lose or gain with respect to an imaginary perfect clock by more
than about one tenth of a microsecond
Warning: Please note that the time displayed here is for demonstration only and may be affected by transmission delay, for which an estimate is given above, and by any workload of your computer. The image on your screen may not therefore represent the actual values of UTC or TAI. It is also possible that the time displayed can be affected by your own Java Virtual Machine.