update

col.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"math"
 	"strconv"
-	"strings"
 	"time"
 )
 
@@ -50,13 +49,14 @@ func (xf *XfRk) String(wb *WorkBook) string {
 	if len(wb.Xfs) > idx {
 		fNo := wb.Xfs[idx].formatNo()
 		if fNo >= 164 { // user defined format
-			if fmt := wb.Formats[fNo]; fmt != nil && strings.Contains(fmt.str, "YY") {
+			if fmt := wb.Formats[fNo]; fmt != nil {
 				i, f, isFloat := xf.Rk.number()
 				if !isFloat {
 					f = float64(i)
 				}
 				t := timeFromExcelTime(f, wb.dateMode == 1)
-				return t.Format(time.RFC3339) //TODO it should be international
+
+				return t.Format(time.RFC3339) //TODO it should be international and format as the describled style
 			}
 			// see http://www.openoffice.org/sc/excelfileformat.pdf
 		} else if 14 <= fNo && fNo <= 17 || fNo == 22 || 27 <= fNo && fNo <= 36 || 50 <= fNo && fNo <= 58 { // jp. date format