diff --git a/README.md b/README.md
index a451b2a..4c6ed8a 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ Before installing the automations, you need to create the required helper entiti
 ### Input Datetimes
 * `input_datetime.day_temp_max_time`
 * `input_datetime.day_temp_min_time`
+* `input_datetime.highest_daily_rainfall_date`
 * `input_datetime.highest_weekly_rainfall_date`
 * `input_datetime.highest_monthly_rainfall_date`
 * `input_datetime.highest_temp_date`