I released a new version of my Clojure conversion and map transformation library to Clojars. It includes two new features:

1. Added natural conversion between Long and Date.

2. You can pass a collection of formats for converting String to Date. It attempts parsing with each of the formats and returns first result which didn’t throw ParseException.

(convert
  "2/12/11"
  (using-format ["yyyy-MM-dd" "M/dd/yy"]
    (to-type java.util.Date)))
; => #<Date Sat Feb 12 00:00:00 CET 2011>

Enjoy!