The memorial service for Katie Rough will be led by Archbishop of York Dr John Sentamu and anyone who attends is being asked to dress smartly with a splash of colour.
Katie died last month after being found with serious injuries in Woodthorpe in York.
A 15-year-old girl has been charged with her murder.
A private family service will be held later on the same day as the public funeral.
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A public funeral for a seven-year-old girl who was killed will be held at York Minster on 13 February.