Cubes released date?

Does anybody knows about the date that the cubes were released? I know it was before the Big Bang but I'm stucked there ._.

I need at least the month and the year(the day doesn't matter) it's for a work :f6:

They were mentioned with the update notes on July 19th, 2010. I don't remember if they posted this prior to the patch or during/after the patch but I know for sure the cubes were released in July of 2010.

Source: http://maplestory.nexon.net/news/updates...tes?page=4

EDIT: I just noticed the event dates in the link I posted, iAmFear is correct about the date the cubes were launched.