Code review comment for lp:~gary-wzl77/ubuntu-calendar-app/fix-1428036

Can we use Locale.NarrowFormat?

http://doc.qt.io/qt-5/qml-qtqml-locale.html#formattype

"Locale.NarrowFormat A special version of day and month names for use when space is limited; for example, returning "J" as a month name. Note that the narrow format might contain the same text for different months and days or it can even be an empty string if the locale doesn't support narrow names, so you should avoid using it for date formatting. Also, for the system locale this format is the same as ShortFormat."