You are correct, information it's from October of 2016 and actually a several changes on dates happened but I trust on information from people working on automotive plants.
As a sample for changing launch dates look on Acura TLX MY 2021, information shows September 2019 but not happened on last...
Downloadable pdf file on link shows information for Vehicle Manufacturer, Vehicle Platform, Vehicle Program, Brand/Nameplate, Assembly Location, SOP and EOP for vehicles produced in North America.
Page 8 of 13 shows next information about Civic:
Vehicle Manufacturer: Honda Motor
Vehicle...
A combined source, first on next link https://www.scribd.com/document/344437926/Automotive-Platforms?language_settings_changed=English
combined with a more precise second source from a friend working on automotive parts company sourcing Honda plants.