From 7eb925839e15881727348f882ff6542ab78a6f10 Mon Sep 17 00:00:00 2001
From: Brian Pandola <bpandola@gmail.com>
Date: Thu, 3 Nov 2022 06:07:49 -0700
Subject: [PATCH] RDS: Add `EarliestRestorableTime` to rds:DescribeDBClusters
 response (#5634)

---
 moto/rds/models.py                  | 6 +++++-
 tests/test_rds/test_rds_clusters.py | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/moto/rds/models.py b/moto/rds/models.py
index 86132e977..62e124738 100644
--- a/moto/rds/models.py
+++ b/moto/rds/models.py
@@ -54,7 +54,7 @@ class Cluster:
         self.account_id = kwargs.get("account_id")
         self.region_name = kwargs.get("region")
         self.cluster_create_time = iso_8601_datetime_with_milliseconds(
-            datetime.datetime.now()
+            datetime.datetime.utcnow()
         )
         self.copy_tags_to_snapshot = kwargs.get("copy_tags_to_snapshot")
         if self.copy_tags_to_snapshot is None:
@@ -107,6 +107,9 @@ class Cluster:
             kwargs.get("enable_cloudwatch_logs_exports") or []
         )
         self.enable_http_endpoint = kwargs.get("enable_http_endpoint")
+        self.earliest_restorable_time = iso_8601_datetime_with_milliseconds(
+            datetime.datetime.utcnow()
+        )
 
     @property
     def db_cluster_arn(self):
@@ -178,6 +181,7 @@ class Cluster:
               <DBClusterParameterGroup>{{ cluster.parameter_group }}</DBClusterParameterGroup>
               <DBSubnetGroup>{{ cluster.subnet_group }}</DBSubnetGroup>
               <ClusterCreateTime>{{ cluster.cluster_create_time }}</ClusterCreateTime>
+              <EarliestRestorableTime>{{ cluster.earliest_restorable_time }}</EarliestRestorableTime>
               <Engine>{{ cluster.engine }}</Engine>
               <Status>{{ cluster.status }}</Status>
               <Endpoint>{{ cluster.endpoint }}</Endpoint>
diff --git a/tests/test_rds/test_rds_clusters.py b/tests/test_rds/test_rds_clusters.py
index 200d0a152..e78ffb9ad 100644
--- a/tests/test_rds/test_rds_clusters.py
+++ b/tests/test_rds/test_rds_clusters.py
@@ -189,6 +189,9 @@ def test_create_db_cluster__verify_default_properties():
     cluster.should.have.key("DomainMemberships").equal([])
     cluster.should.have.key("TagList").equal([])
     cluster.should.have.key("ClusterCreateTime")
+    cluster.should.have.key(
+        "EarliestRestorableTime"
+    ).should.be.greater_than_or_equal_to(cluster["ClusterCreateTime"])
 
 
 @mock_rds