diff --git a/custom_templates/time.jinja b/custom_templates/time.jinja
index ab3ba40..da890cf 100644
--- a/custom_templates/time.jinja
+++ b/custom_templates/time.jinja
@@ -109,4 +109,9 @@
 
 {% macro next_twitch_stream() %}
 {{ custom_time('calendar.tony_s_twitch_schedule','week,day,hour') }}
+{% endmacro %}
+
+{% macro time_diff(sensor) %}
+{% set diff = (as_timestamp(now()) - as_timestamp(states(sensor))) | int %}
+{{ diff }}
 {% endmacro %}
\ No newline at end of file