diff --git a/moto/ec2/models.py b/moto/ec2/models.py
index c7467feee..6ed6e9af0 100755
--- a/moto/ec2/models.py
+++ b/moto/ec2/models.py
@@ -369,6 +369,7 @@ class Instance(TaggedEC2Resource, BotoInstance):
         self.key_name = kwargs.get("key_name")
         self.source_dest_check = "true"
         self.launch_time = utc_date_and_time()
+        self.disable_api_termination = kwargs.get("disable_api_termination", False)
         associate_public_ip = kwargs.get("associate_public_ip", False)
         if in_ec2_classic:
             # If we are in EC2-Classic, autoassign a public IP
diff --git a/moto/ec2/responses/instances.py b/moto/ec2/responses/instances.py
index 4da7b880f..368302235 100644
--- a/moto/ec2/responses/instances.py
+++ b/moto/ec2/responses/instances.py
@@ -297,7 +297,7 @@ EC2_RUN_INSTANCES = """<RunInstancesResponse xmlns="http://ec2.amazonaws.com/doc
                   <attachmentId>{{ nic.attachment_id }}</attachmentId>
                   <deviceIndex>{{ nic.device_index }}</deviceIndex>
                   <status>attached</status>
-                  <attachTime>2015-01-01T00:00:00+0000</attachTime>
+                  <attachTime>2015-01-01T00:00:00Z</attachTime>
                   <deleteOnTermination>true</deleteOnTermination>
                 </attachment>
                 {% if nic.public_ip %}
@@ -462,7 +462,7 @@ EC2_DESCRIBE_INSTANCES = """<DescribeInstancesResponse xmlns="http://ec2.amazona
                             <attachmentId>{{ nic.attachment_id }}</attachmentId>
                             <deviceIndex>{{ nic.device_index }}</deviceIndex>
                             <status>attached</status>
-                            <attachTime>2015-01-01T00:00:00+0000</attachTime>
+                            <attachTime>2015-01-01T00:00:00Z</attachTime>
                             <deleteOnTermination>true</deleteOnTermination>
                           </attachment>
                           {% if nic.public_ip %}