Weird starting hours
Cause : This warning is issued if either of the First Hour of the Day in the Grid Options property of the current DiaryGridLine is greater than 12, or equal to 0. This corresponds to the assumption that most diaries start before noon, and that even the 24/24 diaries do not show midnight; the first hour they show is 1am.
Consequences : This is simply a warning.
•Edit the Grid Options manually, if appropriate.
See also : [h1] : Schedule Hour Tokens.