diff --git a/Design.md b/Design.md
index 6e99f5b..9ca9e86 100644
--- a/Design.md
+++ b/Design.md
@@ -2,6 +2,30 @@
 
 To allow users to enter up to 8 locations based on zip codes or lat/long and have the highs and lows display on a Celtic Wheel type layout based on the movement of the sun and seasons of the year.
 
+|  | SS | CQ |  |
+| --- | --- | --- | --- |
+| CQ |  |  | FE |
+| SE |  |  | CQ |
+|  | CQ | WS |  |
+
+## Explanation
+
+SS = Summer Solstice, 
+CQ = Cross Quarter,
+FE = Fall Equinox, 
+WS = Winter Solstice,
+SE = Spring Equinox
+
+Summer  is placed at the top to represent high elevation.
+A cross quarter is the midway point between each solar location.
+The seasons are then places clockwise so that fall and spring are in middle elevations and winter is low elevation.
+
+The solar locations can be calculated roughly as `month = 3*X`, `day = 21`.
+The day is an estimate which typically actually spans between the 21st and 24th.
+
+Cross quarters are calculated to be `month = (3*X)-1`, `day = 1`.
+An example is Samhein which is typically November 1.
+
 # Components
 
 ## 1. Front End