On Ubuntu Unity 18.04, The default datetime format is quite weird.

If you displayed week, It would show up "三" instead of "星期三".

So you have to change this.

photo_2018-06-01_03-19-34 (2).jpg

Install dconf Editor

sudo apt install dconf-editor

launch dconf-editor and go to:

com -> canonical -> indicator -> datetime

open "custom time format" and change it to:

%A %l:%M %p

选区_086.png

Open "com -> canonical -> indicator -> datetime -> timeformat" and set it to:

custom

选区_087.png

Done!