According to Nokishita, the Canon EOS R5 will begin shipping in late July in Japan, and on July 30 in the United States. There was no mention of a European release date, but you can be pretty sure that it will hit that market around the same time.
It’s also reported that the RF 600mm f/11 IS STM and RF 800mm f/11 IS STM will also begin shipping in late July.
The ship date for the RF 85mm f/2 IS STM Macro has not been mentioned as of yet.
Two other previously rumored lenses, the RF 50mm f/1.8 IS STM and RF 70-200mm f/4L IS USM are likely going to be some kind of a development announcement and will begin shipping later in 2020.
I have been told that the Canon EOS R6 will begin shipping on or around August 27, 2020.
The ship date for the Canon EOS R6 is currently unknown.
Update: I have updated the article to reflect the shipping date for the Canon EOS R6