And now, BuzzFeed readers are, too.
The digital news organization sent out a tweet comparing the situation to Y2K, the technological glitch that some feared would paralyze the world's computer systems at the turn of the millennium.
And a chunk of BuzzFeed's followers had no idea what the acronym meant.
Here's the original BuzzFeed tweet:
y2k15 is happening ??
- BuzzFeed (@BuzzFeed) July 8, 2015
And here's how BuzzFeed's followers responded:
@BuzzFeed what is that
- Aaron Edwards (@aaronmedwards) July 8, 2015
@BuzzFeed wait what's that
- Gerard's mustache (@Geesmustache1) July 8, 2015
@BuzzFeed what?
- ??. (@PhotoLove95) July 8, 2015
@BuzzFeed what?
- Jack (@dunning_jack) July 8, 2015
@BuzzFeed What is it?
- AnISh (@i__AnIsH) July 8, 2015