diff --git a/src/calanonsync/caldav.go b/src/calanonsync/caldav.go
index aa5b65c..46d8cdb 100644
--- a/src/calanonsync/caldav.go
+++ b/src/calanonsync/caldav.go
@@ -86,6 +86,17 @@ func (i *ICal) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 	return nil
 }
 
+func (i ICal) String() string {
+	sb := &strings.Builder{}
+	for n, line := range i.data {
+		if n > 0 {
+			sb.WriteRune('\n')
+		}
+		sb.WriteString(line)
+	}
+	return sb.String()
+}
+
 func ParseICal(r io.Reader) (*ICal, error) {
 	var data []string
 	scanner := bufio.NewScanner(r)