This is a pretty simple project, created with
lein new reagent.
To run it, run lein figwheel in this directory and open http://localhost:3449/
in a browser.
The main code creates two atoms which represent the start and end dates of a trip, and displays the total number of days in the trip.
This example also demonstrates passing atoms into the pikaday constructor to dynamically set the minimum and maximum dates available for each range (so you can't have a trip which starts in the future and extends into the past).
You can see this in action at http://timgilbert.github.io/cljs-pikaday/reagent-example/.