July 2015 Options Expiration Calendar

Precious metals options expiration is the 28th of July for the August contract.

http://www.cmegroup.com/trading/metals/precious/gold_product_calendar_options.html?optionProductId=192#optionProductId=192

Options on derivatives for precious metals close the week before, thus the Sunday night sell off in gold.

http://www.optionsclearing.com/about/publications/expiration-calendar.js