diff --git a/pts/feature/__init__.py b/pts/feature/__init__.py
index 3f16dfb..3a464c3 100644
--- a/pts/feature/__init__.py
+++ b/pts/feature/__init__.py
@@ -2,3 +2,5 @@ from .holiday import (
     CustomDateFeatureSet,
     CustomHolidayFeatureSet,
 )
+from .fourier_date_feature import fourier_time_features_from_frequency
+from .lags import lags_for_fourier_time_features_from_frequency