diff --git a/src/main/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilter.java b/src/main/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilter.java
index 313c44f2647..c7a0314fbb5 100644
--- a/src/main/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilter.java
+++ b/src/main/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilter.java
@@ -91,7 +91,7 @@ private boolean hasServicesOnDate(TripPattern pattern) {
       });
   }
 
-  public static boolean hasServiceDayFilter(GraphQLServiceDateFilterInput serviceDays) {
+  public static boolean hasServiceDateFilter(GraphQLServiceDateFilterInput serviceDays) {
     return (
       serviceDays != null &&
       (serviceDays.getGraphQLStart() != null || serviceDays.getGraphQLEnd() != null)
diff --git a/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/QueryTypeImpl.java b/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/QueryTypeImpl.java
index d5033af7da7..0936d98cf74 100644
--- a/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/QueryTypeImpl.java
+++ b/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/QueryTypeImpl.java
@@ -607,7 +607,9 @@ public DataFetcher<Iterable<Route>> routes() {
       }
 
       if (
-        PatternByServiceDatesFilter.hasServiceDayFilter(args.getGraphQLLimitByPatternServiceDates())
+        PatternByServiceDatesFilter.hasServiceDateFilter(
+          args.getGraphQLLimitByPatternServiceDates()
+        )
       ) {
         var filter = new PatternByServiceDatesFilter(
           transitService,
diff --git a/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/RouteImpl.java b/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/RouteImpl.java
index d9b76ab72ef..ac4a485706b 100644
--- a/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/RouteImpl.java
+++ b/src/main/java/org/opentripplanner/apis/gtfs/datafetchers/RouteImpl.java
@@ -181,7 +181,7 @@ public DataFetcher<Iterable<TripPattern>> patterns() {
 
       var args = new GraphQLTypes.GraphQLRoutePatternsArgs(environment.getArguments());
 
-      if (PatternByServiceDatesFilter.hasServiceDayFilter(args.getGraphQLServiceDates())) {
+      if (PatternByServiceDatesFilter.hasServiceDateFilter(args.getGraphQLServiceDates())) {
         var filter = new PatternByServiceDatesFilter(transitService, args.getGraphQLServiceDates());
         return filter.filterPatterns(patterns);
       } else {
diff --git a/src/test/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilterTest.java b/src/test/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilterTest.java
index 2ef9b22f335..09582d67d3c 100644
--- a/src/test/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilterTest.java
+++ b/src/test/java/org/opentripplanner/apis/gtfs/PatternByServiceDatesFilterTest.java
@@ -3,17 +3,22 @@
 import static java.time.LocalDate.parse;
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.opentripplanner.apis.gtfs.PatternByServiceDatesFilterTest.FilterExpectation.NOT_REMOVED;
 import static org.opentripplanner.apis.gtfs.PatternByServiceDatesFilterTest.FilterExpectation.REMOVED;
 
 import java.time.LocalDate;
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.opentripplanner.apis.gtfs.generated.GraphQLTypes.GraphQLServiceDateFilterInput;
 import org.opentripplanner.model.calendar.CalendarService;
 import org.opentripplanner.transit.model._data.TransitModelForTest;
 import org.opentripplanner.transit.model.framework.FeedScopedId;
@@ -37,6 +42,7 @@ class PatternByServiceDatesFilterTest {
   private static final RegularStop STOP_1 = MODEL.stop("1").build();
   private static final StopPattern STOP_PATTERN = TransitModelForTest.stopPattern(STOP_1, STOP_1);
   private static final TripPattern PATTERN_1 = pattern();
+  private static final LocalDate DATE = LocalDate.parse("2024-05-27");
 
   enum FilterExpectation {
     REMOVED,
@@ -166,4 +172,28 @@ public Set<FeedScopedId> getServiceIdsOnDate(LocalDate date) {
       }
     };
   }
+
+  public static List<GraphQLServiceDateFilterInput> noFilterCases() {
+    var list = new ArrayList<GraphQLServiceDateFilterInput>();
+    list.add(null);
+    list.add(new GraphQLServiceDateFilterInput(Map.of()));
+    return list;
+  }
+
+  @ParameterizedTest
+  @MethodSource("noFilterCases")
+  void hasNoServiceDateFilter(GraphQLServiceDateFilterInput input) {
+    assertFalse(PatternByServiceDatesFilter.hasServiceDateFilter(input));
+  }
+
+  public static List<Map<String, Object>> hasFilterCases() {
+    return List.of(Map.of("start", DATE), Map.of("end", DATE), Map.of("start", DATE, "end", DATE));
+  }
+
+  @ParameterizedTest
+  @MethodSource("hasFilterCases")
+  void hasServiceDateFilter(Map<String, Object> params) {
+    var input = new GraphQLServiceDateFilterInput(params);
+    assertTrue(PatternByServiceDatesFilter.hasServiceDateFilter(input));
+  }
 }