How to get archived events based on end date for a content type with a start date and end date field?
Archived events get based on an end date.

Go to view named archived events. Then click the end date exposed filter in FILTER CRITERIA. Check Filter type to expose is single filter. Then below operator drop down box choice is less than. Next drop down box choice enter relative date. Below now shows Relative date text box give now.
Then click on Apply button.