diff --git a/abcbank/account.py b/abcbank/account.py
index e010009..1841aab 100644
--- a/abcbank/account.py
+++ b/abcbank/account.py
@@ -1,4 +1,6 @@
 from abcbank.transaction import Transaction
+from abcbank.customer import Customer
+from date_provider import DateProvider
 
 CHECKING = 0
 SAVINGS = 1
@@ -9,6 +11,7 @@ class Account:
     def __init__(self, accountType):
         self.accountType = accountType
         self.transactions = []
+        self.logintimes= []
 
     def deposit(self, amount):
         if (amount <= 0):
@@ -22,22 +25,42 @@ def withdraw(self, amount):
         else:
             self.transactions.append(Transaction(-amount))
 
+    def transfer(self,initial_account,final_account,amount):
+        if (amount <= 0):
+            raise ValueError("amount must be greater than zero")
+        elif Customer.numAccs()<=1:
+            raise ValueError("You must have at least 2 accounts")
+        else:
+            self.accountType=initial_account
+            self.withdraw(amount)
+            self.accountType=final_account
+            self.deposit(amount)
+
     def interestEarned(self):
         amount = self.sumTransactions()
-        if self.accountType == SAVINGS:
-            if (amount <= 1000):
-                return amount * 0.001
-            else:
-                return 1 + (amount - 1000) * 0.002
-        if self.accountType == MAXI_SAVINGS:
-            if (amount <= 1000):
-                return amount * 0.02
-            elif (amount <= 2000):
-                return 20 + (amount - 1000) * 0.05
-            else:
-                return 70 + (amount - 2000) * 0.1
+        #This is a false date for testing. A real account would already have recorded the previous transactions
+        t=date('2015','11','09')
+        self.logintimes.append(t)
+
+        currentTime=DateProvider()
+        if self.logintimes is empty:
+            return amount*0
         else:
-            return amount * 0.001
+            instance=len(self.logintimes)
+            lasLogin=self.logintimes[instance]
+            diff=currentTime-lasLogin
+            if self.accountType == SAVINGS:
+                if (amount <= 1000):
+                    return amount * 0.001*diff.days
+                else:
+                    return 1 + (amount - 1000) * 0.002*diff.days
+            if self.accountType == MAXI_SAVINGS:
+                if diff.day >=10:
+                    return amount * 0.05*diff.days
+                else:
+                    return amount * 0.001*diff.days
+            else:
+                return amount * 0.001*diff.days
 
     def sumTransactions(self, checkAllTransactions=True):
-        return sum([t.amount for t in self.transactions])
\ No newline at end of file
+        return sum([t.amount for t in self.transactions])
diff --git a/tests/customer_tests.py b/tests/customer_tests.py
index 0211a4f..264cda8 100644
--- a/tests/customer_tests.py
+++ b/tests/customer_tests.py
@@ -1,6 +1,6 @@
 from nose.tools import assert_equals, nottest
 
-from account import Account, CHECKING, SAVINGS
+from account import Account, CHECKING, SAVINGS, MAXI_SAVINGS
 from customer import Customer
 
 
@@ -33,4 +33,4 @@ def test_twoAccounts():
 def test_threeAccounts():
     oscar = Customer("Oscar").openAccount(Account(SAVINGS))
     oscar.openAccount(Account(CHECKING))
-    assert_equals(oscar.numAccs(), 3)
\ No newline at end of file
+    assert_equals(oscar.numAccs(), 3)