Pluralise birthdays_controller.

app/controllers/birthdays_controller.rb

@@ -0,0 +1,15 @@
+class BirthdaysController < ApplicationController
+  def index
+    n = Date.today
+    e = Date.today + 7.days
+    
+    # two cases here: now + 7days iis still the same month. or it's not.
+    if n.month == e.month
+      @birthdays = Contact.where("birth_month = ? AND birth_day <= ? AND birth_day >= ?", 
+                                 e.month, e.day, n.day)
+    else
+      @birthdays = Contact.where("(birth_month = ? AND birth_day <= ?) OR (birth_month = ? AND birth_day >= ?)",
+                                 e.month, e.day, n.month, n.day)
+    end
+  end
+end