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Charlie Kirk 's fans are expected to come out in the thousands to remember his life and legacy ... with a memorial event scheduled in about a week's time.

Turning Point USA announced an event titled "Building A Legacy: Remembering Charlie Kirk" will take place on Sunday, September 21 at State Farm Stadium in Glendale, Arizona. Getty

The Arizona Cardinals play in the stadium -- they play on the road in San Francisco next week -- and, the official capacity of State Farm Stadium is 63,400.

Sources with knowledge tell TMZ ... despite many referring to this as a "funeral," it is not -- it's a memorial event, an important distinction. Play video content

President Donald Trump said shortly after Charlie died that he plans to attend Charlie's funeral ... unclear if he mean

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