Bug 14572 - insert_single_holiday() forces a value on an AUTO_INCREMENT column, during an INSERT
Removing all the id from the columns on the inserts and removing the
parameter '' of the values for the id.
1) Go to tools -> calendar
2) Add a Holiday only on this day.
3) Add a Holiday repeated every same day of the week.
4) Add a Holiday repeated yearly on the same date.
5) Add a Holidays on a range.
6) Add a Holidays repeated yearly on a range.
7) You should have the five calendars displayed.