Ever since the late 90s , there was a buzz circulated that also involved emails being sent out to random people . The dates that was given were , 9/11/01 & 5/19/13 !

http://www.4chan.org/

http://undergroundworldnews.com

http://www.05-19-13.com/

http://knowyourmeme.com/memes/51913-expect-us

http://www.advantagemexico.com/mexico_city/teotihuacan.html

https://en.wikipedia.org/wiki/Pentecost