I recently upgraded from 12.04 to 14.10 (had to first upgrade to a prior 14.?? version first), and then later on to 15.04 (see below). On the far right-side of the top bar of the graphical screen, I previously had displayed the date & time, weekday, and date/month (without clicking on it and it displaying the full calendar). With the upgrade most of that is now gone and I can only see the time on the menu bar. If I go into System Settings --> Time & Date -- Clock, I see that in the "In the clock, show:" grouping of properties "Weekday" and "Date and month" are unchecked. Towards the top the "Show a clock in the menu bar" is checked, and I also have "12-hour time" checked.
I want the "Weekday" and "Date and month" checked so that they will show on the menu bar, but when I check either or both of them, the clock goes away right then -- that is, it doesn't show the time that it was showing just moments ago, nor does it display anything about the date or time. As soon as I uncheck both "Weekday" and "Date and month" the time will show right back up, with no delay.
I have updated/upgraded/reinstalled indicator-datetime, removed it and installed it again, "dpkg-reconfigure" the package, each time doing a "killall unity-panel-service" to restart the service, and even rebooted some times.
Nothing seems to help -- If one of those 2 settings (or both) are checked all date/time settings go away on the menu bar.
The above is for my regular login account. I created a "Guest Session", of which it creates a temporary login in /tmp, and saw that it deleted it when I logged out of it. It did the same as my normal log ID did -- that is, only the time showed up on the menu bar, and when I went to clock settings and changed the "Weekday" / "Date & Month" settings, the clock disappeared.
I did a fresh install of ubuntu 14.10 on another machine after I did this upgrade. The fresh install was on a Win computer that I resized the Win partition on. It does the same thing as the upgrade I talked about above.
I first posed the above as a question, and no one was able to help me, and they said I probably should report a bug, but I might want to wait until 15.04 was released and I upgraded. I have now upgraded to 15.04 on both of my computers, and they still do the same thing.
I have encountered another problem with the "Time & Date Settings". I have my location set up as "Chicago". I noticed that when you go into the "Clock" tab, you can set up additional "Locations". I set up an additional location for "UTC". Both of these times display when you click on the clock on the top menu bar and it pops up the Calendar. They display at the bottom. It works fine for most of the time. "UTC" is (now) 5 hours ahead of "Chicago" time. When "Chicago" time reads 18:59 UTC reads 23.59. "Chicago" clicks over to 19:00 and "UTC" clicks over to the next day, the "UTC" time then disappears. I take it that it disappears until "Chicago" time clicks over to the next day, so that "Chicago" and "UTC" are then on the same day again.
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