Fortunately for me (and you!), there is a core app that provides a handy Calendar. Michael Hall featured this application a few weeks ago on his blog covering a development rundown of the application. It covers the list of features nicely. In a word, there's a lot of neat stuff to test in there.
Looking at the buglist of needs there are only 2 showing in-progress -- plenty of room for someone to help out by testing each one of the different views. Monthly, daily, weekly; accessed via swiping.
" Swiping left and right on the month will take you back or forward a month at a time. Swiping left or right on the bottom half will take you back and forward a day at a time.
Pull the event area down and let it go, and the month will collapse down into a single week. Now swiping left and right there will move you back and forward a week at a time. Pull down and let it go again and it will snap back to showing the full month.
Finally, you have an option in the toolbar (swipe up from the bottom edge) to switch from an event list to a timeline view of your events."
Are you dizzy yet?
These seamless transitions could use some cool testcases! At the moment, the app is seeing it's first merge requests being made by Carla Sella and Kunal Parmar. The team has faced some issues with uncovering some unique requirements for autopilot, which have now been fixed. Excellent work both of you!
Consider helping Carla, Kunal and the ubuntu calendar developers as the application and it's features mature. Grab the calendar branch, add a testcase from the list of needs, follow the tutorial for help if needed, and propose a merge. Thanks for helping be a part of ubuntu!