diff --git a/search.go b/search.go
index 98790c9e..c2ebafbb 100644
--- a/search.go
+++ b/search.go
@@ -170,6 +170,16 @@ func (fr *FacetRequest) AddDateTimeRange(name string, start, end time.Time) {
 	fr.DateTimeRanges = append(fr.DateTimeRanges, &dateTimeRange{Name: name, Start: start, End: end})
 }
 
+// AddDateTimeRangeString adds a bucket to a field
+// containing date values.
+func (fr *FacetRequest) AddDateTimeRangeString(name string, start, end *string) {
+	if fr.DateTimeRanges == nil {
+		fr.DateTimeRanges = make([]*dateTimeRange, 0, 1)
+	}
+	fr.DateTimeRanges = append(fr.DateTimeRanges,
+		&dateTimeRange{Name: name, startString: start, endString: end})
+}
+
 // AddNumericRange adds a bucket to a field
 // containing numeric values.  Documents with a
 // numeric value falling into this range are