diff --git a/pkg/tsdb/postgres/macros.go b/pkg/tsdb/postgres/macros.go
index f82997ace11..05e39f2c762 100644
--- a/pkg/tsdb/postgres/macros.go
+++ b/pkg/tsdb/postgres/macros.go
@@ -79,15 +79,15 @@ func (m *PostgresMacroEngine) evaluateMacro(name string, args []string) (string,
 		}
 		return fmt.Sprintf("extract(epoch from %s) as \"time\"", args[0]), nil
 	case "__timeFilter":
-		// don't use to_timestamp in this macro for redshift compatibility #9566
 		if len(args) == 0 {
 			return "", fmt.Errorf("missing time column argument for macro %v", name)
 		}
-		return fmt.Sprintf("extract(epoch from %s) BETWEEN %d AND %d", args[0], m.TimeRange.GetFromAsSecondsEpoch(), m.TimeRange.GetToAsSecondsEpoch()), nil
+
+		return fmt.Sprintf("%s BETWEEN '%s' AND '%s'", args[0], m.TimeRange.GetFromAsTimeUTC().Format(time.RFC3339), m.TimeRange.GetToAsTimeUTC().Format(time.RFC3339)), nil
 	case "__timeFrom":
-		return fmt.Sprintf("to_timestamp(%d)", m.TimeRange.GetFromAsSecondsEpoch()), nil
+		return fmt.Sprintf("'%s'", m.TimeRange.GetFromAsTimeUTC().Format(time.RFC3339)), nil
 	case "__timeTo":
-		return fmt.Sprintf("to_timestamp(%d)", m.TimeRange.GetToAsSecondsEpoch()), nil
+		return fmt.Sprintf("'%s'", m.TimeRange.GetToAsTimeUTC().Format(time.RFC3339)), nil
 	case "__timeGroup":
 		if len(args) < 2 {
 			return "", fmt.Errorf("macro %v needs time column and interval and optional fill value", name)
diff --git a/pkg/tsdb/postgres/macros_test.go b/pkg/tsdb/postgres/macros_test.go
index f441690a429..c3c15691e42 100644
--- a/pkg/tsdb/postgres/macros_test.go
+++ b/pkg/tsdb/postgres/macros_test.go
@@ -12,7 +12,7 @@ import (
 
 func TestMacroEngine(t *testing.T) {
 	Convey("MacroEngine", t, func() {
-		engine := &PostgresMacroEngine{}
+		engine := NewPostgresMacroEngine()
 		query := &tsdb.Query{}
 
 		Convey("Given a time range between 2018-04-12 00:00 and 2018-04-12 00:05", func() {
@@ -38,14 +38,14 @@ func TestMacroEngine(t *testing.T) {
 				sql, err := engine.Interpolate(query, timeRange, "WHERE $__timeFilter(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("WHERE extract(epoch from time_column) BETWEEN %d AND %d", from.Unix(), to.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("WHERE time_column BETWEEN '%s' AND '%s'", from.Format(time.RFC3339), to.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __timeFrom function", func() {
 				sql, err := engine.Interpolate(query, timeRange, "select $__timeFrom(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("select to_timestamp(%d)", from.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("select '%s'", from.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __timeGroup function", func() {
@@ -68,7 +68,7 @@ func TestMacroEngine(t *testing.T) {
 				sql, err := engine.Interpolate(query, timeRange, "select $__timeTo(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("select to_timestamp(%d)", to.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("select '%s'", to.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __unixEpochFilter function", func() {
@@ -102,21 +102,21 @@ func TestMacroEngine(t *testing.T) {
 				sql, err := engine.Interpolate(query, timeRange, "WHERE $__timeFilter(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("WHERE extract(epoch from time_column) BETWEEN %d AND %d", from.Unix(), to.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("WHERE time_column BETWEEN '%s' AND '%s'", from.Format(time.RFC3339), to.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __timeFrom function", func() {
 				sql, err := engine.Interpolate(query, timeRange, "select $__timeFrom(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("select to_timestamp(%d)", from.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("select '%s'", from.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __timeTo function", func() {
 				sql, err := engine.Interpolate(query, timeRange, "select $__timeTo(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("select to_timestamp(%d)", to.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("select '%s'", to.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __unixEpochFilter function", func() {
@@ -150,21 +150,21 @@ func TestMacroEngine(t *testing.T) {
 				sql, err := engine.Interpolate(query, timeRange, "WHERE $__timeFilter(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("WHERE extract(epoch from time_column) BETWEEN %d AND %d", from.Unix(), to.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("WHERE time_column BETWEEN '%s' AND '%s'", from.Format(time.RFC3339), to.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __timeFrom function", func() {
 				sql, err := engine.Interpolate(query, timeRange, "select $__timeFrom(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("select to_timestamp(%d)", from.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("select '%s'", from.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __timeTo function", func() {
 				sql, err := engine.Interpolate(query, timeRange, "select $__timeTo(time_column)")
 				So(err, ShouldBeNil)
 
-				So(sql, ShouldEqual, fmt.Sprintf("select to_timestamp(%d)", to.Unix()))
+				So(sql, ShouldEqual, fmt.Sprintf("select '%s'", to.Format(time.RFC3339)))
 			})
 
 			Convey("interpolate __unixEpochFilter function", func() {
diff --git a/pkg/tsdb/time_range.go b/pkg/tsdb/time_range.go
index 3bd4e228999..777fd15907e 100644
--- a/pkg/tsdb/time_range.go
+++ b/pkg/tsdb/time_range.go
@@ -37,6 +37,10 @@ func (tr *TimeRange) GetFromAsSecondsEpoch() int64 {
 	return tr.GetFromAsMsEpoch() / 1000
 }
 
+func (tr *TimeRange) GetFromAsTimeUTC() time.Time {
+	return tr.MustGetFrom().UTC()
+}
+
 func (tr *TimeRange) GetToAsMsEpoch() int64 {
 	return tr.MustGetTo().UnixNano() / int64(time.Millisecond)
 }
@@ -45,6 +49,10 @@ func (tr *TimeRange) GetToAsSecondsEpoch() int64 {
 	return tr.GetToAsMsEpoch() / 1000
 }
 
+func (tr *TimeRange) GetToAsTimeUTC() time.Time {
+	return tr.MustGetTo().UTC()
+}
+
 func (tr *TimeRange) MustGetFrom() time.Time {
 	if res, err := tr.ParseFrom(); err != nil {
 		return time.Unix(0, 0)