diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 3bec7e4..09896ab 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -6,11 +6,11 @@
 
 ## Upgrading
 
-* Change the `curtailable` flag default of the PV config to `None`.
+<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
 
 ## New Features
 
-<!-- Here goes the main new features and examples or instructions on how to use them -->
+* Add start and end time to microgrid configs.
 
 ## Bug Fixes
 
diff --git a/src/frequenz/gridpool/_microgrid_config.py b/src/frequenz/gridpool/_microgrid_config.py
index b99e6d2..f83fe8f 100644
--- a/src/frequenz/gridpool/_microgrid_config.py
+++ b/src/frequenz/gridpool/_microgrid_config.py
@@ -7,6 +7,7 @@
 import re
 import tomllib
 from dataclasses import field
+from datetime import datetime
 from pathlib import Path
 from typing import Any, ClassVar, Literal, Self, Type, cast, get_args
 
@@ -111,6 +112,12 @@ def is_valid_type(cls, ctype: str) -> bool:
 class PVConfig:
     """Configuration of a PV system in a microgrid."""
 
+    start_time: datetime | None = None
+    """Start time of the PV system installation."""
+
+    end_time: datetime | None = None
+    """End time of the PV system installation."""
+
     peak_power: float | None = None
     """Peak power of the PV system in Watt."""
 
@@ -123,8 +130,15 @@ class PVConfig:
 
 @dataclass(frozen=True)
 class WindConfig:
+    # pylint: disable=too-many-instance-attributes
     """Configuration of a wind turbine in a microgrid."""
 
+    start_time: datetime | None = None
+    """Start time of the wind turbine installation."""
+
+    end_time: datetime | None = None
+    """End time of the wind turbine installation."""
+
     turbine_model: str | None = None
     """Model name of the wind turbine."""
 
@@ -151,6 +165,12 @@ class WindConfig:
 class BatteryConfig:
     """Configuration of a battery in a microgrid."""
 
+    start_time: datetime | None = None
+    """Start time of the battery installation."""
+
+    end_time: datetime | None = None
+    """End time of the battery installation."""
+
     capacity: float | None = None
     """Capacity of the battery in Wh."""
 
@@ -184,6 +204,12 @@ class Metadata:
     altitude: float | None = None
     """Geographic altitude of the microgrid."""
 
+    start_time: datetime | None = None
+    """Start time of the microgrid operation."""
+
+    end_time: datetime | None = None
+    """End time of the microgrid operation."""
+
 
 @dataclass
 class MicrogridConfig: