{"record":{"id":"355e4ccf0d8fb979","repo":"qax-os/excelize","slug":"invalid-date-value-f-negative-values-are-not-sup","errorCode":null,"errorMessage":"invalid date value %f, negative values are not supported","messagePattern":"invalid date value (.+?), negative values are not supported","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"errors.go","lineNumber":285,"sourceCode":"\treturn fmt.Errorf(\"the operator %q in expression %q is not valid in relation to Blanks/NonBlanks\", op, exp)\n}\n\n// newInvalidCellNameError defined the error message on receiving the invalid\n// cell name.\nfunc newInvalidCellNameError(cell string) error {\n\treturn fmt.Errorf(\"invalid cell name %q\", cell)\n}\n\n// newInvalidColumnNameError defined the error message on receiving the\n// invalid column name.\nfunc newInvalidColumnNameError(col string) error {\n\treturn fmt.Errorf(\"invalid column name %q\", col)\n}\n\n// newInvalidExcelDateError defined the error message on receiving the data\n// with negative values.\nfunc newInvalidExcelDateError(dateValue float64) error {\n\treturn fmt.Errorf(\"invalid date value %f, negative values are not supported\", dateValue)\n}\n\n// newInvalidLinkTypeError defined the error message on receiving the invalid\n// hyper link type.\nfunc newInvalidLinkTypeError(linkType string) error {\n\treturn fmt.Errorf(\"invalid link type %q\", linkType)\n}\n\n// newInvalidNameError defined the error message on receiving the invalid\n// defined name or table name.\nfunc newInvalidNameError(name string) error {\n\treturn fmt.Errorf(\"invalid name %q, the name should be starts with a letter or underscore, can not include a space or character, and can not conflict with an existing name in the workbook\", name)\n}\n\n// newInvalidOptionalValue defined the error message on receiving the invalid\n// optional value.\nfunc newInvalidOptionalValue(name, value string, values []string) error {\n\treturn fmt.Errorf(\"invalid %s value %q, acceptable value should be one of %s\", name, value, strings.Join(values, \", \"))","sourceCodeStart":267,"sourceCodeEnd":303,"githubUrl":"https://github.com/qax-os/excelize/blob/f2483381fbfbe432a6baa98d48a1c277183f3285/errors.go#L267-L303","documentation":"Error from newInvalidExcelDateError, returned by ExcelDateToTime when the Excel serial date is negative, which has no calendar representation in this library; at fault is the raw serial float read from or passed for conversion.","triggerScenarios":"Thrown at errors.go:285 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Guard serial values >= 0 before conversion","Reject or sanitize the source cell value that produced the negative serial"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"f2483381fbfbe432a6baa98d48a1c277183f3285","analyzedAt":"2026-09-02T01:26:19.299Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-09T06:17:21.866Z"}