* [Dayone] don't break if the system timezone is UTC
* [DayOne] re-enable tests that were failing on Travis
* [DayOne] change as per code review to avoid `except: pass`
c.f. commit 7cbca9f60f
c.f. commit 398283a8db3177b1ae122e5b9d6a9d623cf9106f
[Dayone] Skip failing tests on Travis
Travis sets the timezone to UTC, which causes many tests to fail