diff --git a/ejp_xml_pipeline/cli.py b/ejp_xml_pipeline/cli.py
index e92b35d7..3fc5427c 100644
--- a/ejp_xml_pipeline/cli.py
+++ b/ejp_xml_pipeline/cli.py
@@ -66,9 +66,15 @@ def get_s3_client():
     return session.create_client('s3')
 
 
-def list_objects_with_pattern(s3_client, bucket: str, pattern: str) -> list:
-    """List objects in S3 using prefix and client-side pattern matching"""
-    # Get the prefix by taking everything before the first wildcard
+def list_objects_with_pattern_and_timestamp(
+    s3_client,
+    bucket: str,
+    pattern: str,
+    latest_timestamp: datetime
+) -> list:
+    """
+    List objects in S3 matching pattern and modified after latest_timestamp
+    """
     prefix = pattern.split('*')[0]
     paginator = s3_client.get_paginator('list_objects_v2')
     matching_objects = []
@@ -83,11 +89,12 @@ def list_objects_with_pattern(s3_client, bucket: str, pattern: str) -> list:
             if 'Contents' in page:
                 for obj in page['Contents']:
                     key = obj['Key']
-                    # Use fnmatch for shell-style pattern matching
-                    if fnmatch.fnmatch(key, pattern):
+                    last_modified = obj['LastModified']
+                    # Check both pattern match and timestamp
+                    if (fnmatch.fnmatch(key, pattern) and last_modified > latest_timestamp):
                         matching_objects.append({
                             'name': key,
-                            'last_modified': obj['LastModified']
+                            'last_modified': last_modified
                         })
     except botocore.exceptions.ClientError as err:
         LOGGER.error('Error listing objects with prefix %s: %s', prefix, err)
@@ -105,11 +112,22 @@ def etl_s3_object_pattern(
     s3_client = get_s3_client()
     matching_files = {}
 
-    # For each pattern, get matching objects
-    for pattern in obj_pattern_with_latest_dates:
-        objects = list_objects_with_pattern(s3_client, s3_bucket_name, pattern)
+    # For each pattern and its timestamp, get matching objects
+    for pattern, latest_timestamp in obj_pattern_with_latest_dates.items():
+        objects = list_objects_with_pattern_and_timestamp(
+            s3_client,
+            s3_bucket_name,
+            pattern,
+            latest_timestamp
+        )
         if objects:
             matching_files[pattern] = objects
+            LOGGER.info(
+                'Found %d new files for pattern %s modified after %s',
+                len(objects),
+                pattern,
+                latest_timestamp.isoformat()
+            )
 
     # Process matching files
     for object_key_pattern, files_list in matching_files.items():