I wanted to find all the sermons in my library that were preaching on Christmas day. Sadly, neither {Label Sermon WHERE Date ~ <Date 25 December>} nor {Label Sermon WHERE Date ~ <Date 25 December *>} works.
It would be great if wildcard support could be added, or if there was some kind of mapping to the DayOfYear datatype so I could have done {Label Sermon WHERE Date ~ <DayOfYear 25 December>}.