Currently Being ModeratedFeb 9, 2014 3:02 PM (in response to raulfromsao bernardo do campo)
Are you using iCloud calendars? If so try temporarily turning the Calendar syncing off to refresh the sync.
In System Preferences > Internet Accounts > iCloud > uncheck Calendars. Then open Calendar, to make sure the calendars are no longer synced. Then turn the preference back on in System Preferences.