diff --git a/ontology/saref4auto.ttl b/ontology/saref4auto.ttl
index e1397c47f8b9bf6733b1091666f9ffbba8199b82..fcdb675e9f5ba1b8e7d1989c86989416a56683b2 100644
--- a/ontology/saref4auto.ttl
+++ b/ontology/saref4auto.ttl
@@ -96,6 +96,13 @@ geosp:hasGeometry rdf:type owl:ObjectProperty ;
                                                    rdfs:isDefinedBy "http://www.w3.org/2003/01/geo/wgs84_pos#" ;
                                                    rdfs:label "location"@en .
 
+### https://saref.etsi.org/saref4auto/hasPhenomenonTime
+saref:hasPhenomenonTime a owl:ObjectProperty ;
+    rdfs:label "has phenomenon time"@en ;
+    rdfs:comment "Links a procedure execution to the time that the result applies. It may be an interval or an instant, or some other compound temporal entity expressed using OWL Time."@en ;
+    rdfs:range time:TemporalEntity ;
+    skos:historyNote "V3.2.1: Introduced saref:hasPhenomenonTime as part of general will to make SAREF and SOSA/SSN converge."@en .
+
 
 ###  http://www.w3.org/2006/time#hasBeginning
 time:hasBeginning rdf:type owl:ObjectProperty ;
@@ -1070,6 +1077,10 @@ saref:UnitOfMeasure rdf:type owl:Class ;
 ###  https://saref.etsi.org/saref4auto/ElectronicControlUnit
 :ElectronicControlUnit rdf:type owl:Class ;
                        rdfs:subClassOf saref:Device ,
+                                       [ a owl:Restriction ;
+                                        owl:onProperty saref:hasPhenomenonTime ; 
+                                        owl:someValuesFrom time:TemporalEntity 
+                                       ] ,
                                        s4syst:System ,
                                        [ rdf:type owl:Restriction ;
                                          owl:onProperty saref:measuresProperty ;
@@ -1605,6 +1616,10 @@ saref:UnitOfMeasure rdf:type owl:Class ;
 ###  https://saref.etsi.org/saref4auto/RoadSideSensor
 :RoadSideSensor rdf:type owl:Class ;
                 rdfs:subClassOf saref:Sensor ,
+                                [ a owl:Restriction ;
+                                owl:onProperty saref:hasPhenomenonTime ; 
+                                owl:someValuesFrom time:TemporalEntity 
+                                ] ,
                                 [ rdf:type owl:Restriction ;
                                   owl:onProperty saref:measuresProperty ;
                                   owl:someValuesFrom :Heading
@@ -1770,6 +1785,10 @@ saref:UnitOfMeasure rdf:type owl:Class ;
 
 ###  https://saref.etsi.org/saref4auto/TrafficLightController
 :TrafficLightController rdf:type owl:Class ;
+      rdfs:subClassOf [ a owl:Restriction ;
+                        owl:onProperty saref:hasPhenomenonTime ; 
+                        owl:someValuesFrom time:TemporalEntity 
+                      ] ;
                         rdfs:subClassOf :RoadSideActuator ;
                         rdfs:comment "A device that automatically operates coloured lights, typically red, amber, and green, for controlling traffic at road junctions, pedestrian crossings, and roundabouts."@en ;
                         rdfs:label "TrafficLight"@en .