diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0a9eb824c5..912a81d3db8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,7 @@
 * [BUGFIX] Fixed ingesters with less tokens stuck in LEAVING. #5061
 * [BUGFIX] Tracing: Fix missing object storage span instrumentation. #5074
 * [BUGFIX] Ingester: Ingesters returning empty response for metadata APIs. #5081
+* [FEATURE] Alertmanager: Add support for time_intervals. #5102
 
 ## 1.14.0 2022-12-02
 
diff --git a/pkg/alertmanager/alertmanager.go b/pkg/alertmanager/alertmanager.go
index 5cb46ca5927..33a34076a48 100644
--- a/pkg/alertmanager/alertmanager.go
+++ b/pkg/alertmanager/alertmanager.go
@@ -368,9 +368,13 @@ func (am *Alertmanager) ApplyConfig(userID string, conf *config.Config, rawCfg s
 		return nil
 	}
 
-	muteTimes := make(map[string][]timeinterval.TimeInterval, len(conf.MuteTimeIntervals))
+	timeIntervals := make(map[string][]timeinterval.TimeInterval, len(conf.MuteTimeIntervals)+len(conf.TimeIntervals))
 	for _, ti := range conf.MuteTimeIntervals {
-		muteTimes[ti.Name] = ti.TimeIntervals
+		timeIntervals[ti.Name] = ti.TimeIntervals
+	}
+
+	for _, ti := range conf.TimeIntervals {
+		timeIntervals[ti.Name] = ti.TimeIntervals
 	}
 
 	pipeline := am.pipelineBuilder.New(
@@ -378,7 +382,7 @@ func (am *Alertmanager) ApplyConfig(userID string, conf *config.Config, rawCfg s
 		waitFunc,
 		am.inhibitor,
 		silence.NewSilencer(am.silences, am.marker, am.logger),
-		muteTimes,
+		timeIntervals,
 		am.nflog,
 		am.state,
 	)