Events that occurred on 5 May.
 On Earth
- 1917 - Edith Tolkien writes her first letter to her husband at Thirtle Bridge army camp, near Withernsea from her new lodgings in Hornsea. The letter was re-directed to Hornsea Musketry Camp.
- 1944 - Actor John Rhys-Davies is born.
- 1958 - Author James Branch Cabell dies.
- 1977 - J.R.R. Tolkien: A Biography is first published in the UK.
- 2009 - The Legend of Sigurd and Gudrún is published.
- 2010 - The America's Next Top Model episode "Hobbits vs. Models" premières on The CW.
- 2011 - English and Medieval Studies Presented to J.R.R. Tolkien on the Occasion of his Seventieth Birthday is made available as a print-on-demand publication from HarperCollins.
 In Arda
- There are no known events for this day.