Date of Max. Drawdown (Trade Close to Trade Close)  

Displays the date that greatest loss drawdown, from the previous highest equity run-up occurred, closed trade to closed trade, (including commissions and slippage if specified) looking across all trades, during the specified period. If a new closed trade  equity run-up high occurs we reset the low equity value to 0, looking for the next maximum drawdown from that point. Displays a value for All Trades only.

You can roughly see this value on a standard equity curve graph by looking from the highest peaks to the lowest peaks moving forward. (Peak to Valley)