Princess Peach dates Mario.
Super Why - 2007 Momotaro the Peach Boy 1-33 was released on: USA: 4 September 2008
Super Why - 2007 The Princess and the Pea 1-16 was released on: USA: 20 November 2007
Miami Animal Police - 2004 Super Snake Princess was released on: USA: 11 February 2005
She Was a Peach - 1914 was released on: USA: 4 April 1914
Cavalcade of Cartoon Comedy - 2008 Super Mario Rescues the Princess 1-1 was released on: USA: 9 September 2008
In 48 Hours The Making of Super Amazing Ninja Zombie Princess Adventure - 2013 was released on: USA: 23 July 2013 (internet)
This is the asker. I found a table that listed the exact release dates of every episode, minus the omakes and Wedding Peach DX. I added them to Wedding Peach's Wikipedia article.
The Living Peach - 1911 was released on: USA: 15 November 1911
Pearls and a Peach - 1918 was released on: USA: 23 December 1918
The Pasadena Peach - 1912 was released on: USA: 26 April 1912
A Peach and a Pair - 1915 was released on: USA: 22 June 1915