03/03/2017
Gold Parity Day
On this day in 2017, 1 bitcoin surpassed the price of 1 oz of gold for the first time
However, the actual Gold parity date was likely December 5th, 2013. The reason this is hidden on most bitcoin price history charts is because they use newer exchanges for their price history data.
For example, many use Coinbase.
While Coinbase was founded in 2012, it was not a very big exchange in 2013, especially when compared to MTGOX.
MTGOX was responsible for ~70% of all bitcoin trading volume on earth in 2013, so their price data is, by far, the most accurate. 