Rare 61-second minute sends Wall Street scrambling

An additional second will be added on to the end of the day on June 30, 2015, resulting in a rare 61 second minute.

Instead of resetting to zero after reaching the 59 second mark, the clock will instead read 23 hours, 59 minutes, and 60 seconds.

This decision was made by the International Earth Rotation and Reference Systems Service, the global timekeeping body, in order to reconcile the atomic clock with the Earth's rotation.

These leap seconds are incorporated every few years, with 25 occurring since 1972.

The last one will have happened exactly three years prior to the one scheduled for next month.

Workers on Wall Street and other time-sensitive industries are nervous about potentially costly computer glitches that may happen as a result.

Amazon Web Services has stated that it is planning for a temporary time discrepancy since its systems will not be registering the 60th second.