diff --git a/proto/col_datetime.go b/proto/col_datetime.go
index 0fd373ad..65d05bd2 100644
--- a/proto/col_datetime.go
+++ b/proto/col_datetime.go
@@ -51,7 +51,8 @@ func (c *ColDateTime) Infer(t ColumnType) error {
 
 func (c ColDateTime) loc() *time.Location {
 	if c.Location == nil {
-		return time.UTC
+		// Defaulting to local timezone (not UTC).
+		return time.Local
 	}
 	return c.Location
 }
@@ -61,7 +62,7 @@ func (c ColDateTime) Row(i int) time.Time {
 }
 
 func (c *ColDateTime) Append(v time.Time) {
-	c.Data = append(c.Data, ToDateTime(v.In(c.loc())))
+	c.Data = append(c.Data, ToDateTime(v))
 }
 
 // LowCardinality returns LowCardinality for Enum8 .
diff --git a/proto/col_datetime64.go b/proto/col_datetime64.go
index 48c87356..a676ecad 100644
--- a/proto/col_datetime64.go
+++ b/proto/col_datetime64.go
@@ -59,11 +59,15 @@ func (c *ColDateTime64) Infer(t ColumnType) error {
 }
 
 func (c ColDateTime64) Row(i int) time.Time {
-	loc := time.UTC
-	if c.Location != nil {
-		loc = c.Location
+	return c.Data[i].Time(c.Precision).In(c.loc())
+}
+
+func (c ColDateTime64) loc() *time.Location {
+	if c.Location == nil {
+		// Defaulting to local timezone (not UTC).
+		return time.Local
 	}
-	return c.Data[i].Time(c.Precision).In(loc)
+	return c.Location
 }
 
 func (c *ColDateTime64) Append(v time.Time) {