If you make any distribution in 2019 before December 7, it will part of your RMD but won't be a QCD even if you have it sent to a charity. So if you want your IRA RMD for 2019 to be entirely satisfied by a QCD, you'll have to make sure that the distribution is made after December 6, 2019 and is received by the charity before the end of 2019.
