diff --git a/promslog/slog.go b/promslog/slog.go
index f9f899663..acce21a3e 100644
--- a/promslog/slog.go
+++ b/promslog/slog.go
@@ -200,9 +200,8 @@ func defaultReplaceAttr(_ []string, a slog.Attr) slog.Attr {
 	key := a.Key
 	switch key {
 	case slog.TimeKey:
-		if t, ok := a.Value.Any().(time.Time); ok {
-			a.Value = slog.TimeValue(t.UTC())
-		} else {
+		// Note that we do not change the timezone to UTC anymore.
+		if _, ok := a.Value.Any().(time.Time); !ok {
 			// If we can't cast the any from the value to a
 			// time.Time, it means the caller logged
 			// another attribute with a key of `time`.