diff --git a/internal/helpers/schema_date.go b/internal/helpers/schema_date.go
new file mode 100644
index 0000000..4c28aad
--- /dev/null
+++ b/internal/helpers/schema_date.go
@@ -0,0 +1,37 @@
+package helpers
+
+import (
+	"reflect"
+
+	"github.com/google/jsonschema-go/jsonschema"
+	twapi "github.com/teamwork/twapi-go-sdk"
+)
+
+// WithDateTypeSchema registers a JSON-schema override for the twapi.Date type
+// on the given generation options. twapi.Date is defined as `type Date
+// time.Time`, so the reflection-based generator would otherwise emit a useless
+// object schema for time.Time's unexported fields. This override forces it to a
+// nullable, date-only string.
+//
+// Use it whenever generating an output schema from a response type that carries
+// (or sideloads) twapi.Date fields:
+//
+//	schema, err = jsonschema.For[Response](helpers.WithDateTypeSchema(&jsonschema.ForOptions{}))
+//
+// Any other options already set on opts (including pre-existing TypeSchemas
+// entries) are preserved. The options value is modified in place and also
+// returned for convenient chaining.
+func WithDateTypeSchema(opts *jsonschema.ForOptions) *jsonschema.ForOptions {
+	if opts == nil {
+		opts = &jsonschema.ForOptions{}
+	}
+	if opts.TypeSchemas == nil {
+		opts.TypeSchemas = make(map[reflect.Type]*jsonschema.Schema)
+	}
+	opts.TypeSchemas[reflect.TypeFor[twapi.Date]()] = &jsonschema.Schema{
+		Types:       []string{"null", "string"},
+		Format:      "date",
+		Description: "Null or date-only date string",
+	}
+	return opts
+}
diff --git a/internal/twprojects/calendar_events.go b/internal/twprojects/calendar_events.go
index cdce2a8..ee6119d 100644
--- a/internal/twprojects/calendar_events.go
+++ b/internal/twprojects/calendar_events.go
@@ -29,7 +29,9 @@ func init() {
 	var err error
 
 	// generate the output schema only once
-	calendarEventListOutputSchema, err = jsonschema.For[projects.CalendarEventListResponse](&jsonschema.ForOptions{})
+	calendarEventListOutputSchema, err = jsonschema.For[projects.CalendarEventListResponse](
+		helpers.WithDateTypeSchema(&jsonschema.ForOptions{}),
+	)
 	if err != nil {
 		panic(fmt.Sprintf("failed to generate JSON schema for CalendarEventListResponse: %v", err))
 	}
diff --git a/internal/twprojects/search.go b/internal/twprojects/search.go
index 968a05a..f90c14a 100644
--- a/internal/twprojects/search.go
+++ b/internal/twprojects/search.go
@@ -28,7 +28,7 @@ var (
 func init() {
 	var err error
 
-	searchOutputSchema, err = jsonschema.For[projects.SearchResponse](&jsonschema.ForOptions{})
+	searchOutputSchema, err = jsonschema.For[projects.SearchResponse](helpers.WithDateTypeSchema(&jsonschema.ForOptions{}))
 	if err != nil {
 		panic(fmt.Sprintf("failed to generate JSON schema for SearchResponse: %v", err))
 	}
diff --git a/internal/twprojects/tasks.go b/internal/twprojects/tasks.go
index b13830a..db357da 100644
--- a/internal/twprojects/tasks.go
+++ b/internal/twprojects/tasks.go
@@ -37,12 +37,12 @@ func init() {
 	var err error
 
 	// generate the output schemas only once
-	taskGetOutputSchema, err = jsonschema.For[projects.TaskGetResponse](&jsonschema.ForOptions{})
+	taskGetOutputSchema, err = jsonschema.For[projects.TaskGetResponse](helpers.WithDateTypeSchema(&jsonschema.ForOptions{}))
 	if err != nil {
 		panic(fmt.Sprintf("failed to generate JSON schema for TaskGetResponse: %v", err))
 	}
 	helpers.WithMetaWebLinkSchema(taskGetOutputSchema)
-	taskListOutputSchema, err = jsonschema.For[projects.TaskListResponse](&jsonschema.ForOptions{})
+	taskListOutputSchema, err = jsonschema.For[projects.TaskListResponse](helpers.WithDateTypeSchema(&jsonschema.ForOptions{}))
 	if err != nil {
 		panic(fmt.Sprintf("failed to generate JSON schema for TaskListResponse: %v", err))
 	}