Mac Calendar has stopped allowing events to be entered on Sundays from month view? Mac Calendar has stopped allowing events to be entered or viewed on Sundays from the Month view.  If I double click on a date on the month view, for a Sunday, nothing happens but if I go to the day view there is a default New Event on the day.  

If I enter an event from the day view it does not appear on the Sunday in the month view.

Having been a Windows user for a long time I did wait to ask this question until I had turned the machine off for day and then back on the next day.

Is any one else experiencing this issue?
Is there a setting somewhere that got changed?
Quit iCal, and try removing the com.apple.iCal.plist file from your Mac


Open Finder
Go Menu, hold the option key and click on Library
Go to Preferences
Remove the com.apple.iCal.plist file or put .bak behind it (backup)
Logout or reboot your Mac and your problem should be fixed.