Add "school tomorrow" sensor

sensors/time.yaml

@@ -9,3 +9,12 @@
     month_is:
       friendly_name: 'Month is'
       value_template: "{{ ['January','February','March','April','May','June','August','September','October','November','December'][now().month-1] }}" 
+    school_tomorrow:
+      friendly_name: 'School Tomorrow'
+      value_template: >-
+        {%- set test=(as_timestamp(now())+ (86400)) | timestamp_custom("%Y-%m-%d",true) %}
+        {% if states.calendar.kallen_school_days.attributes.start_time == test + " 09:00:00" %}
+          on
+        {% else %}
+          off
+        {% endif %}