diff --git a/artifice/api/web.py b/artifice/api/web.py
index 59cf40f..fa6c39a 100644
--- a/artifice/api/web.py
+++ b/artifice/api/web.py
@@ -218,16 +218,9 @@ def add_costs_for_tenant(tenant, RatesManager):
     return tenant
 
 
-def generate_sales_order(draft, tenant_id):
+def generate_sales_order(draft, tenant_id, end):
     session = Session()
 
-    if draft:
-        end = datetime.utcnow()
-    else:
-        # Today, the beginning of.
-        end = datetime.utcnow().\
-            replace(hour=0, minute=0, second=0, microsecond=0)
-
     if isinstance(tenant_id, unicode):
         tenant_query = session.query(Tenant).\
             filter(Tenant.id == tenant_id)
@@ -242,15 +235,24 @@ def generate_sales_order(draft, tenant_id):
 
     rates = RatesFile(config.rates_config)
 
-    session.begin()
     # Get the last sales order for this tenant, to establish
     # the proper ranging
     start = session.query(func.max(SalesOrder.end).label('end')).\
         filter(SalesOrder.tenant_id == tenant_id).first().end
     if not start:
         start = dawn_of_time
+
+    # these coditionals need work, also some way to
+    # ensure all given timedate values are in UTC?
+    if end <= start:
+        return 400, {"errors": ["end date must be greater than " +
+                                "the end of the last sales order range."]}
+    if end > datetime.utcnow():
+        return 400, {"errors": ["end date cannot be a future date."]}
+
     usage = db.usage(start, end, tenant_id)
 
+    session.begin()
     if not draft:
         order = SalesOrder(tenant_id=tenant_id, start=start, end=end)
         session.add(order)
@@ -318,7 +320,19 @@ def regenerate_sales_order(tenant_id, target):
 @returns_json
 def run_sales_order_generation():
     tenant_id = flask.request.json.get("tenant", None)
-    return generate_sales_order(False, tenant_id)
+    end = flask.request.json.get("end", None)
+    if not end:
+        # Today, the beginning of.
+        end = datetime.utcnow().\
+            replace(hour=0, minute=0, second=0, microsecond=0)
+    else:
+        try:
+            end = datetime.strptime(end, iso_date)
+        except ValueError:
+            return 400, {"errors": ["'end' date given needs to be in format:" +
+                                    " y-m-d"]}
+
+    return generate_sales_order(False, tenant_id, end)
 
 
 @app.route("sales_draft", methods=["POST"])
@@ -326,7 +340,22 @@ def run_sales_order_generation():
 @returns_json
 def run_sales_draft_generation():
     tenant_id = flask.request.json.get("tenant", None)
-    return generate_sales_order(True, tenant_id)
+    end = flask.request.json.get("end", None)
+
+    if not end:
+        end = datetime.utcnow()
+    else:
+        try:
+            end = datetime.strptime(end, iso_date)
+        except ValueError:
+            try:
+                end = datetime.strptime(end, iso_time)
+            except ValueError:
+                return 400, {
+                    "errors": ["'end' date given needs to be in format: " +
+                               "y-m-d, or y-m-dTH:M:S"]}
+
+    return generate_sales_order(True, tenant_id, end)
 
 
 @app.route("sales_historic", methods=["POST"])
diff --git a/artifice/database.py b/artifice/database.py
index 134ab3e..ee8752b 100644
--- a/artifice/database.py
+++ b/artifice/database.py
@@ -64,9 +64,6 @@ class Database(object):
            start, end: define the range to query
            tenant: a tenant entry (tenant_id for now)"""
 
-        if start > end:
-            raise AttributeError("End must be a later date than start.")
-
         # build a query set in the format:
         # tenant_id  | resource_id | service | sum(volume)
         query = self.session.query(UsageEntry.tenant_id,
diff --git a/client/client.py b/client/client.py
index ff4334a..09b4632 100644
--- a/client/client.py
+++ b/client/client.py
@@ -23,14 +23,14 @@ class Client(object):
         except ConnectionError as e:
             print e
 
-    def sales_order(self, tenants, draft):
+    def sales_order(self, tenants, end, draft):
         if draft:
             url = self.endpoint + "sales_draft"
         else:
             url = self.endpoint + "sales_order"
 
         for tenant in tenants:
-            data = {"tenant": tenant}
+            data = {"tenant": tenant, 'end': end}
             try:
                 response = requests.post(url,
                                          headers={"Content-Type":
diff --git a/client/shell.py b/client/shell.py
index 383cce6..04772dc 100644
--- a/client/shell.py
+++ b/client/shell.py
@@ -55,6 +55,9 @@ if __name__ == '__main__':
         "-t", "--tenant", dest="tenants",
         help='Tenants to create sales orders for.',
         action="append", default=[])
+    sales_parser.add_argument(
+        "-e", "--end", dest="end",
+        help='end date for sales order.')
 
     draft_parser = subparsers.add_parser(
         'sales-draft',
@@ -63,6 +66,9 @@ if __name__ == '__main__':
         "-t", "--tenant", dest="tenants",
         help='Tenants to create sales drafts for.',
         action="append", default=[])
+    draft_parser.add_argument(
+        "-e", "--end", dest="end",
+        help='end date for sales order.')
 
     historic_parser = subparsers.add_parser(
         'sales-historic',
@@ -94,10 +100,10 @@ if __name__ == '__main__':
         client.usage()
 
     if args.command == 'sales-order':
-        client.sales_order(args.tenants, False)
+        client.sales_order(args.tenants, args.end, False)
 
     if args.command == 'sales-draft':
-        client.sales_order(args.tenants, True)
+        client.sales_order(args.tenants, args.end, True)
 
     if args.command == 'sales-historic':
         client.sales_historic(args.tenants, args.date)