I need to merge two calendars in macOS Sierra Calendar App. I found instructions on the web that describe how to do this with previous versions of OS X, however these are not relevant for macOS Sierra. The answer to this question provides the same steps, which does not solve my problem.
Basically, the problem is if you export the calendar, then import the calendar, it will simply import back into the original calendar, giving you no choice to where you want it imported. There is never an option to select a target calendar as described in the previously mentioned steps.
Is it no longer possible to merge two calendars in macOS Sierra Calendar App? Are there any other ways to do this?