add time_date sensor page

source/components/sensor.time_date.markdown

@@ -0,0 +1,29 @@
+---
+layout: page
+title: "Time & Date support"
+description: "Instructions how to integrate the time and the date within Home Assistant."
+date: 2015-05-08 17:15
+sidebar: false
+comments: false
+sharing: true
+footer: true
+---
+
+The time and date platform simple displays the time, the date, or both.
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  platform: time_date
+  monitored_variables:
+    - type: 'time'
+    - type: 'date'
+    - type: 'datetime'
+```
+
+The type *datetime* shows the date and the time. The other two types just the time or the date. 
+
+<p class='img'>
+  <img src='{{site_root}}/images/screenshots/time_date.png' />
+</p>
+