diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index 1c1ef6c2..8596f015 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -6,6 +6,14 @@ This project adheres to [Semantic Versioning](https://semver.org/). Version numb
 - **MINOR**: New features that are backward-compatible.
 - **PATCH**: Bug fixes or minor changes that do not affect backward compatibility.
 
+## [1.11.0]
+
+_released 07-30-2025
+
+### Added
+ - Added feature to optionally close test run using --auto-close-run in add_run command
+ - Added support for Start and End Date API changes for Test Runs and Test Plans
+
 ## [1.10.1]
 
 _released 07-11-2025
diff --git a/README.md b/README.md
index afb2e373..b4250ad5 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ trcli
 ```
 You should get something like this:
 ```
-TestRail CLI v1.10.1
+TestRail CLI v1.11.0
 Copyright 2025 Gurock Software GmbH - www.gurock.com
 Supported and loaded modules:
     - parse_junit: JUnit XML Files (& Similar)
@@ -45,7 +45,7 @@ CLI general reference
 --------
 ```shell
 $ trcli --help
-TestRail CLI v1.10.1
+TestRail CLI v1.11.0
 Copyright 2025 Gurock Software GmbH - www.gurock.com
 Usage: trcli [OPTIONS] COMMAND [ARGS]...
 
@@ -287,7 +287,7 @@ will be used to upload all results into the same test run.
 ### Reference
 ```shell
 $ trcli add_run --help
-TestRail CLI v1.10.1
+TestRail CLI v1.11.0
 Copyright 2025 Gurock Software GmbH - www.gurock.com
 Usage: trcli add_run [OPTIONS]
 
@@ -298,9 +298,12 @@ Options:
   --run-description      Summary text to be added to the test run.
   --milestone-id         Milestone ID to which the Test Run should be
                          associated to.  [x>=1]
+  --run-start-date       The expected or scheduled start date of this test run in MM/DD/YYYY format
+  --run-end-date         The expected or scheduled end date of this test run in MM/DD/YYYY format
   --run-assigned-to-id   The ID of the user the test run should be assigned
                          to.  [x>=1]
   --run-include-all      Use this option to include all test cases in this test run.
+  --auto-close-run       Use this option to automatically close the created run.
   --run-case-ids         Comma separated list of test case IDs to include in
                          the test run (i.e.: 1,2,3,4).
   --run-refs             A comma-separated list of references/requirements
@@ -326,7 +329,7 @@ providing you with a solid base of test cases, which you can further expand on T
 ### Reference
 ```shell
 $ trcli parse_openapi --help
-TestRail CLI v1.10.1
+TestRail CLI v1.11.0
 Copyright 2025 Gurock Software GmbH - www.gurock.com
 Usage: trcli parse_openapi [OPTIONS]
 
diff --git a/tests/test_project_based_client.py b/tests/test_project_based_client.py
index 6d45c1fa..a0efc005 100644
--- a/tests/test_project_based_client.py
+++ b/tests/test_project_based_client.py
@@ -390,6 +390,7 @@ def test_create_or_update_test_run_calls_add_run(self, project_based_client_data
             project_based_client,
         ) = project_based_client_data_provider
         environment.run_id = None
+        environment.auto_close_run = False
         api_request_handler.add_run.return_value = (1, "")
         project_based_client.resolve_project()
         run_id, error_message = project_based_client.create_or_update_test_run()
@@ -411,6 +412,7 @@ def test_create_or_update_test_run_calls_update_run(self, project_based_client_d
             project_based_client,
         ) = project_based_client_data_provider
         environment.run_id = 1
+        environment.auto_close_run = False
         api_request_handler.update_run.return_value = (1, "")
         project_based_client.resolve_project()
         run_id, error_message = project_based_client.create_or_update_test_run()
diff --git a/tests/test_results_uploader.py b/tests/test_results_uploader.py
index ae1e6f09..235bea5c 100644
--- a/tests/test_results_uploader.py
+++ b/tests/test_results_uploader.py
@@ -208,16 +208,14 @@ def test_upload_results_successful(
                 2: mocker.call("Removing unnecessary empty sections that may have been created earlier. ", new_line=False),
                 3: mocker.call("Removed 1 unused/empty section(s)."),
                 4: mocker.call("Creating test run. ", new_line=False),
-                5: mocker.call("Test run: https://fake_host.com/index.php?/runs/view/100"),
-                6: mocker.call("Closing test run. ", new_line=False),
+                5: mocker.call("Closing run. ", new_line=False),
             }
         else:
             calls = {
                 2: mocker.call("Removing unnecessary empty sections that may have been created earlier. ", new_line=False),
                 3: mocker.call("Removed 1 unused/empty section(s)."),
                 4: mocker.call("Updating test run. ", new_line=False),
-                5: mocker.call("Test run: https://fake_host.com/index.php?/runs/view/101"),
-                6: mocker.call("Closing test run. ", new_line=False),
+                5: mocker.call("Closing run. ", new_line=False),
             }
 
         results_uploader.upload_results()
diff --git a/tests_e2e/test_end2end.py b/tests_e2e/test_end2end.py
index bc1b9892..8d18e4fe 100644
--- a/tests_e2e/test_end2end.py
+++ b/tests_e2e/test_end2end.py
@@ -444,6 +444,25 @@ def test_cli_add_run_upload_results(self):
                 "Submitted 6 test results"
             ]
         )
+    
+    def test_cli_add_run_and_plan_with_due_date(self):
+        output = _run_cmd(f"""
+trcli -y \\
+  -h {self.TR_INSTANCE} \\
+  --project "SA - (DO NOT DELETE) TRCLI-E2E-Tests" \\
+  add_run --run-include-all \\
+  --title "[CLI-E2E-Tests] ADD RUN TEST: Test Run with Due Date" \\
+  --run-start-date "03/01/2030" --run-end-date "03/12/2030"
+        """)
+        _assert_contains(
+            output,
+            [
+                "Creating test run.",
+                f"Test run: {self.TR_INSTANCE}index.php?/runs/view",
+                "title: [CLI-E2E-Tests] ADD RUN TEST: Test Run with Due Date"
+            ]
+        )
+
 
     def bug_test_cli_robot_description_bug(self):
         output = _run_cmd(f"""
diff --git a/trcli/__init__.py b/trcli/__init__.py
index a0865bba..f84c53b0 100644
--- a/trcli/__init__.py
+++ b/trcli/__init__.py
@@ -1 +1 @@
-__version__ = "1.10.1"
+__version__ = "1.11.0"
diff --git a/trcli/api/api_request_handler.py b/trcli/api/api_request_handler.py
index 7e54d943..b5623dff 100644
--- a/trcli/api/api_request_handler.py
+++ b/trcli/api/api_request_handler.py
@@ -404,6 +404,8 @@ def add_run(
             project_id: int,
             run_name: str,
             milestone_id: int = None,
+            start_date: str = None,
+            end_date: str = None,
             plan_id: int = None,
             config_ids: List[int] = None,
             assigned_to_id: int = None,
@@ -420,6 +422,8 @@ def add_run(
         add_run_data = self.data_provider.add_run(
             run_name,
             case_ids=case_ids,
+            start_date=start_date,
+            end_date=end_date,
             milestone_id=milestone_id,
             assigned_to_id=assigned_to_id,
             include_all=include_all,
@@ -443,7 +447,8 @@ def add_run(
             run_id = response.response_text["runs"][0]["id"]
         return run_id, response.error_message
 
-    def update_run(self, run_id: int, run_name: str, milestone_id: int = None) -> Tuple[dict, str]:
+    def update_run(self, run_id: int, run_name: str, start_date: str = None,
+            end_date: str = None, milestone_id: int = None) -> Tuple[dict, str]:
         """
         Updates an existing run
         :run_id: run id
@@ -453,7 +458,8 @@ def update_run(self, run_id: int, run_name: str, milestone_id: int = None) -> Tu
         run_response = self.client.send_get(f"get_run/{run_id}")
         existing_description = run_response.response_text.get("description", "")
 
-        add_run_data = self.data_provider.add_run(run_name, milestone_id=milestone_id)
+        add_run_data = self.data_provider.add_run(run_name, start_date=start_date,
+            end_date=end_date, milestone_id=milestone_id)
         add_run_data["description"] = existing_description  # Retain the current description
 
         run_tests, error_message = self.__get_all_tests_in_run(run_id)
diff --git a/trcli/api/project_based_client.py b/trcli/api/project_based_client.py
index ba230b25..1bf27375 100644
--- a/trcli/api/project_based_client.py
+++ b/trcli/api/project_based_client.py
@@ -214,6 +214,8 @@ def create_or_update_test_run(self) -> Tuple[int, str]:
                 project_id=self.project.project_id,
                 run_name=self.run_name,
                 milestone_id=self.environment.milestone_id,
+                start_date=self.environment.run_start_date,
+                end_date=self.environment.run_end_date,
                 plan_id=self.environment.plan_id,
                 config_ids=self.environment.config_ids,
                 assigned_to_id=self.environment.run_assigned_to_id,
@@ -228,6 +230,13 @@ def create_or_update_test_run(self) -> Tuple[int, str]:
             run, error_message = self.api_request_handler.update_run(
                 run_id, self.run_name, self.environment.milestone_id
             )
+        if self.environment.auto_close_run:
+            self.environment.log("Closing run. ", new_line=False)
+            close_run, error_message = self.api_request_handler.close_run(run_id)
+            if close_run:
+                self.environment.log("Run closed successfully.")
+            else:
+                self.environment.elog(f"Failed to close run: {error_message}")
         if error_message:
             self.environment.elog("\n" + error_message)
         else:
diff --git a/trcli/cli.py b/trcli/cli.py
index a38b9f94..3fa81ccb 100755
--- a/trcli/cli.py
+++ b/trcli/cli.py
@@ -51,6 +51,8 @@ def __init__(self, cmd="parse_junit"):
         self.plan_id = None
         self.config_ids = None
         self.milestone_id = None
+        self.run_start_date = None
+        self.run_end_date = None
         self.section_id = None
         self.auto_creation_response = None
         self.silent = None
@@ -65,6 +67,7 @@ def __init__(self, cmd="parse_junit"):
         self.run_assigned_to_id = None
         self.run_case_ids = None
         self.run_include_all = None
+        self.auto_close_run = None
         self.run_refs = None
         self.proxy = None  # Add proxy related attributes
         self.noproxy = None
diff --git a/trcli/commands/cmd_add_run.py b/trcli/commands/cmd_add_run.py
index c618d376..b2d270b4 100644
--- a/trcli/commands/cmd_add_run.py
+++ b/trcli/commands/cmd_add_run.py
@@ -14,6 +14,8 @@ def print_config(env: Environment):
             f"\n> Suite ID: {env.suite_id}"
             f"\n> Description: {env.run_description}"
             f"\n> Milestone ID: {env.milestone_id}"
+            f"\n> Start Date: {env.run_start_date}"
+            f"\n> End Date: {env.run_end_date}"
             f"\n> Assigned To ID: {env.run_assigned_to_id}"
             f"\n> Include All: {env.run_include_all}"
             f"\n> Case IDs: {env.run_case_ids}"
@@ -54,6 +56,20 @@ def write_run_to_file(environment: Environment, run_id: int):
     metavar="",
     help="Milestone ID to which the Test Run should be associated to.",
 )
+@click.option(
+    "--run-start-date",
+    metavar="",
+    default=None,
+    type=lambda x: [int(i) for i in x.split("/") if len(x.split("/")) == 3], 
+    help="The expected or scheduled start date of this test run in MM/DD/YYYY format"
+)
+@click.option(
+    "--run-end-date",
+    metavar="",
+    default=None,
+    type=lambda x: [int(i) for i in x.split("/") if len(x.split("/")) == 3], 
+    help="The expected or scheduled end date of this test run in MM/DD/YYYY format"
+)
 @click.option(
     "--run-assigned-to-id",
     type=click.IntRange(min=1),
@@ -66,6 +82,12 @@ def write_run_to_file(environment: Environment, run_id: int):
     default=False,
     help="Use this option to include all test cases in this test run."
 )
+@click.option(
+    "--auto-close-run",
+    is_flag=True,
+    default=False,
+    help="Use this option to automatically close the created run."
+)
 @click.option(
     "--run-case-ids",
     metavar="",
diff --git a/trcli/data_providers/api_data_provider.py b/trcli/data_providers/api_data_provider.py
index 05015106..3b98c144 100644
--- a/trcli/data_providers/api_data_provider.py
+++ b/trcli/data_providers/api_data_provider.py
@@ -1,6 +1,7 @@
 from beartype.typing import List, Dict, Optional
 
 from serde.json import to_dict
+from datetime import datetime, timezone
 
 from trcli.constants import OLD_SYSTEM_NAME_AUTOMATION_ID, UPDATED_SYSTEM_NAME_AUTOMATION_ID
 from trcli.data_classes.dataclass_testrail import TestRailSuite
@@ -66,6 +67,8 @@ def add_run(
             self,
             run_name: Optional[str],
             case_ids=None,
+            start_date=None,
+            end_date=None,
             milestone_id=None,
             assigned_to_id=None,
             include_all=None,
@@ -93,6 +96,18 @@ def add_run(
             "milestone_id": milestone_id,
             "case_ids": case_ids
         }
+        if isinstance(start_date, list) and start_date is not None:
+            try:
+                dt = datetime(start_date[2], start_date[0], start_date[1], tzinfo=timezone.utc)
+                body["start_on"] = int(dt.timestamp())
+            except ValueError:
+                body["start_on"] = None
+        if isinstance(end_date, list) and end_date is not None:
+            try:
+                dt = datetime(end_date[2], end_date[0], end_date[1], tzinfo=timezone.utc)
+                body["due_on"] = int(dt.timestamp())
+            except ValueError:
+                body["due_on"] = None
         if include_all is not None:
             body["include_all"] = include_all
         if assigned_to_id is not None: