How to export a date range in Calendar

A workaround would be:

• Create a temporary calendar from File>New Calendar.

• Mark the calendars you want to export:

  

• Depending on the time range you want to export select week or month view:

  

• Go to the week or month you want to export, press ⌘A to select all events and ⌘C to copy them.

• Select the temporary calendar:

  

  and press ⌘V to paste all previously copied events.

• Export the temporary calendar as an ics file:

  

• Delete the temporary calendar with Edit>Delete.

Although jaume came up with an very easy workaround somebody might be looking for an even easier solution. Take a look at the Calex App which offers a little bit more features. For example Calex lets you export multiple calendars into one single file.

You can at least Drag and Drop single events out of the Calendar window.