Created attachment 28123 [details] Patch svn diff Attached patch resolves issue in CellDataFormatter that causes date-time values to be formatted incorrectly for a format with hours and minutes but not seconds (e.g. "h:m"). New test case added to DateFormatTests.xlsx (sheet 'Tests', row 42). Additional change to DateFormatTests.xlsx: on sheet 'Flags', deleted value of Categories flag and changed value of AllColors flag to True, so that all tests in the workbook are run.
Created attachment 28124 [details] DateFormatTests.xlsx with new test
Thanks, patch applied in r1229281. (As an aside, this code looks to duplicate some of the things in DataFormatter, so long term we should probably try to merge the logic of the two where possible)