I wanted to provide you with all the CBOE and CME expiration dates for 2018 that I have been able to pull up from all my research. Note that not all dates are plotted yet, if you can find any of the missing CBOE dates, please comment below so I can update!
Here is active thread on Trading view https://www.tradingview.com/chart/BTCUSDT/rFBrTnUf-BTC-Futures-Expiration-dates/