diff --git a/setup.py b/setup.py
index 612fdeb..84fa827 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@ def package_files(directory):
     "argv_emulation": False,
 }
 
-with open("README.md", "r") as fh:
+with open("README.md", "r", encoding="utf-8") as fh:
     LONG_DESRIPTION = fh.read()
 
 setup(
@@ -45,7 +45,7 @@ def package_files(directory):
         "Operating System :: MacOS :: MacOS X",
         "Natural Language :: English",
     ],
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     data_files=DATA_FILES,
     options={"py2app": OPTIONS},
     setup_requires=["py2app"],
diff --git a/tests/test_things.py b/tests/test_things.py
index 6a36c7e..1f0058f 100644
--- a/tests/test_things.py
+++ b/tests/test_things.py
@@ -165,6 +165,10 @@ def test_anytime(self):
     def test_logbook(self):
         tasks = things.logbook()
         self.assertEqual(21, len(tasks))
+        tasks = things.logbook(stop_date="2099-03-29")
+        self.assertEqual(0, len(tasks))
+        tasks = things.logbook(stop_date="2021-03-28")
+        self.assertEqual(21, len(tasks))
 
     def test_canceled(self):
         tasks = things.canceled()
diff --git a/things/__init__.py b/things/__init__.py
index 27a526a..4272be2 100644
--- a/things/__init__.py
+++ b/things/__init__.py
@@ -4,7 +4,7 @@
 __copyright__ = "2021 Alexander Willner & Michael Belfrage"
 __credits__ = ["Alexander Willner", "Michael Belfrage"]
 __license__ = "Apache License 2.0"
-__version__ = "0.0.12"
+__version__ = "0.0.13"
 __maintainer__ = ["Alexander Willner", "Michael Belfrage"]
 __email__ = "alex@willner.ws"
 __status__ = "Development"
diff --git a/things/database.py b/things/database.py
index c568571..931aa4e 100755
--- a/things/database.py
+++ b/things/database.py
@@ -5,6 +5,7 @@
 import re
 import sqlite3
 from textwrap import dedent
+from datetime import datetime
 
 
 # --------------------------------------------------
@@ -83,6 +84,7 @@
 DATE_DEADLINE = "dueDate"
 DATE_MODIFIED = "userModificationDate"
 DATE_START = "startDate"
+DATE_STOP = "stopDate"
 
 # --------------------------------------------------
 # Various filters
@@ -161,7 +163,7 @@ def __init__(self, filepath=None, print_sql=False):
         # Automated migration to new database location in Things 3.12.6/3.13.1
         # --------------------------------
         try:
-            with open(self.filepath) as file:
+            with open(self.filepath, encoding="utf-8") as file:
                 if "Your database file has been moved there" in file.readline():
                     self.filepath = DEFAULT_FILEPATH
         except (UnicodeDecodeError, FileNotFoundError, PermissionError):
@@ -181,6 +183,7 @@ def get_tasks(  # pylint: disable=R0914
         heading=None,
         tag=None,
         start_date=None,
+        stop_date=None,
         deadline=None,
         deadline_suppressed=None,
         trashed=False,
@@ -246,6 +249,7 @@ def get_tasks(  # pylint: disable=R0914
             {make_filter("TASK.dueDateSuppressionDate", deadline_suppressed)}
             {make_filter("TAG.title", tag)}
             {make_date_filter(f"TASK.{DATE_START}", start_date)}
+            {make_date_filter(f"TASK.{DATE_STOP}", stop_date)}
             {make_date_filter(f"TASK.{DATE_DEADLINE}", deadline)}
             {make_date_range_filter(f"TASK.{DATE_CREATED}", last)}
             {make_search_filter(search_query)}
@@ -635,9 +639,10 @@ def make_date_filter(date_column: str, value) -> str:
     date_column : str
         Name of the column that has date information on a task.
 
-    value : bool, 'future', 'past', or None
+    value : bool, 'future', 'past', ISO 8601 date or None
         `True` or `False` indicates whether a date is set or not.
         `'future'` or `'past'` indicates a date in the future or past.
+        `ISO 8601` date is a string in the format `YYYY-MM-DD`.
         `None` indicates any value.
 
     Returns
@@ -657,6 +662,9 @@ def make_date_filter(date_column: str, value) -> str:
     >>> make_date_filter('start_date', 'future')
     "AND date(start_date, 'unixepoch', 'localtime') > date('now', 'localtime')"
 
+    >>> make_date_filter('stop_date', '2021-03-28')
+    "AND date(stop_date, 'unixepoch', 'localtime') >= date('2021-03-28', 'localtime')"
+
     >>> make_date_filter('created', None)
     ''
 
@@ -668,10 +676,14 @@ def make_date_filter(date_column: str, value) -> str:
         return make_filter(date_column, value)
 
     # compare `date_column` to now.
-    validate("value", value, ["future", "past"])
+    try:
+        now = f"date('{datetime.fromisoformat(value)}', 'localtime')"
+        operator = ">="
+    except ValueError:
+        validate("value", value, ["future", "past"])
+        operator = ">" if value == "future" else "<="
+        now = "date('now', 'localtime')"
     date = f"date({date_column}, 'unixepoch', 'localtime')"
-    operator = ">" if value == "future" else "<="
-    now = "date('now', 'localtime')"
 
     return f"AND {date} {operator} {now}"