Template:User BlizzCon

You can specify the years you've attended as an optional parameter (either first or |years=)

Examples:

{{User BlizzCon|2007}}
{{User BlizzCon|2005, 2007, and 2008}}{{User BlizzCon|2013}}
{{User BlizzCon|2009|2013}}

This user attended BlizzCon 2007.

This user attended BlizzCon 2005, 2007, and 2008.

This user attended BlizzCon 2013.

This user attended BlizzCon 2009 and is planning to attend BlizzCon 2014.

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This user attended BlizzCon.