The definition of irony took a real beating in the '90s. Alanis Morissette tried, she really did, and she made the term popular, but much to the consternation of English teachers everywhere, her examples set a whole generation of students back.
Yes, rain on your wedding day is unfortunate, but it's not irony. Finding 10,000 spoons when all you need is a knife is definitely Murphy's Law, but not irony. A death row pardon two minutes too late is tragic, but not irony.
This right here is much closer.