Broken handling of All-Day events

All-day events are not being shown on the day they occur, when that date is selected in the calendar, and all-day events which occur on Fridays seem to not be appearing at all. Furthermore, it also seems that all-day events which span multiple days are also handled poorly, listed as starting at 00:00 on the first day, and not appearing on the other days.

In Online Services we have a few calendars for hours, meetings, and for the client engineering subteam we have review days, which we specify in a calendar. I have these calendars subscribed to in Evolution. The all-day events used to appear on the day they occurred, so this seems to be a regression.

Some examples:

All-day events; To see who is on call for reviews today, I must select the previous day. The event for Friday however, does not show up at all, so selecting Thursday dates on the calendar do not show me any future all-day events that occur on the Friday.

Multi-day all-day event: I will be on holiday May 06-10, but this does not show correctly in the events list when I select any of those days. Instead, when I select the preceding Sunday May 05 in the calendar, the event shows as starting Monday at 00:00, rather than being an all-day event which spans multiple days.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: indicator-datetime 12.10.3daily13.03.26-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-18.28-generic 3.8.6
Uname: Linux 3.8.0-18-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Thu Apr 18 10:01:40 2013
InstallationDate: Installed on 2012-10-21 (178 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
SourcePackage: indicator-datetime
UpgradeStatus: Upgraded to raring on 2012-12-24 (114 days ago)