People Are Convinced That This Leap Second Is Basically a Y2K Disaster Waiting to Happen

Some people are panicking a bit. Why? Because apparently adding an extra second to the last second of June will result in a Y2K-level disaster.
Last time we had a Leap Second, lots of websites had glitches or even full-out crashes and airlines were hit with flight delays. The Stock Market can experience problems as well because trades can happen in just one second.
The Leap Second isn't exactly harmless, but not in a "the world is ending, make peace with your gods" kind of way. So everyone just stay calm.