Prince Philip died on April 9, the same day Prince Charles and wife Camilla celebrated their 16th wedding anniversary.
The bittersweet coincidence means both occasions will now be forever linked, a fact that is bound to cause the heir to the throne added sadness.
Charles and Camilla, the Duchess of Cornwall, tied the knot on April 9, 2005, almost 35 years after they first met.
The couple met in the 1970s and famously had an affair in the 1980s, when they were both still married.