@@ -47,13 +47,16 @@
     'HAVE_THREADS',
 
     # C version: compile time choice that enables the coroutine local context
-    'HAVE_CONTEXTVAR'
+    'HAVE_CONTEXTVAR',
+
+    # Highest version of the spec this module complies with
+    'SPEC_VERSION',
 ]
 
 __xname__ = __name__    # sys.modules lookup (--without-threads)
 __name__ = 'decimal'    # For pickling
-__version__ = '1.70'    # Highest version of the spec this complies with
-                        # See http://speleotrove.com/decimal/
+SPEC_VERSION = '1.70'   # Highest version of the spec this complies with
+                        # See https://speleotrove.com/decimal/decarith.html
 __libmpdec_version__ = "2.4.2" # compatible libmpdec version
 
 import math as _math
@@ -6404,3 +6407,11 @@ def _format_number(is_negative, intpart, fracpart, exp, spec):
 # _PyHASH_10INV is the inverse of 10 modulo the prime _PyHASH_MODULUS
 _PyHASH_10INV = pow(10, _PyHASH_MODULUS - 2, _PyHASH_MODULUS)
 del sys
+
+def __getattr__(name):
+    if name == "__version__":
+        from warnings import _deprecated
+
+        _deprecated("__version__", remove=(3, 20))
+        return SPEC_VERSION
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
@@ -7,7 +7,7 @@
 
 FUNCTIONS:
     _getlang -- Figure out what language is being used for the locale
-    strptime -- Calculates the time struct represented by the passed-in string
+    _strptime -- Calculates the time struct represented by the passed-in string
 
 """
 import os
@@ -371,7 +371,9 @@ def __init__(self, locale_time=None):
             # W is set below by using 'U'
             'y': r"(?P<y>\d\d)",
             'Y': r"(?P<Y>\d\d\d\d)",
-            'z': r"(?P<z>[+-]\d\d:?[0-5]\d(:?[0-5]\d(\.\d{1,6})?)?|(?-i:Z))",
+            # See gh-121237: "z" must support colons for backwards compatibility.
+            'z': r"(?P<z>([+-]\d\d:?[0-5]\d(:?[0-5]\d(\.\d{1,6})?)?)|(?-i:Z))?",
+            ':z': r"(?P<colon_z>([+-]\d\d:[0-5]\d(:[0-5]\d(\.\d{1,6})?)?)|(?-i:Z))?",
             'A': self.__seqToRE(self.locale_time.f_weekday, 'A'),
             'a': self.__seqToRE(self.locale_time.a_weekday, 'a'),
             'B': self.__seqToRE(_fixmonths(self.locale_time.f_month[1:]), 'B'),
@@ -380,7 +382,10 @@ def __init__(self, locale_time=None):
             'Z': self.__seqToRE((tz for tz_names in self.locale_time.timezone
                                         for tz in tz_names),
                                 'Z'),
-            '%': '%'}
+            'n': r'\s*',
+            't': r'\s*',
+            '%': '%',
+        }
         if self.locale_time.LC_alt_digits is None:
             for d in 'dmyCHIMS':
                 mapping['O' + d] = r'(?P<%s>\d\d|\d| \d)' % d
@@ -416,6 +421,8 @@ def __init__(self, locale_time=None):
         mapping['W'] = mapping['U'].replace('U', 'W')
 
         base.__init__(mapping)
+        base.__setitem__('D', self.pattern('%m/%d/%y'))
+        base.__setitem__('F', self.pattern('%Y-%m-%d'))
         base.__setitem__('T', self.pattern('%H:%M:%S'))
         base.__setitem__('R', self.pattern('%H:%M'))
         base.__setitem__('r', self.pattern(self.locale_time.LC_time_ampm))
@@ -457,28 +464,39 @@ def pattern(self, format):
         format = re_sub(r'\s+', r'\\s+', format)
         format = re_sub(r"'", "['\u02bc]", format)  # needed for br_FR
         year_in_format = False
-        day_of_month_in_format = False
+        day_d_in_format = False
+        day_e_in_format = False
         def repl(m):
-            format_char = m[1]
-            match format_char:
+            directive = m.group()[1:] # exclude `%` symbol
+            match directive:
                 case 'Y' | 'y' | 'G':
                     nonlocal year_in_format
                     year_in_format = True
                 case 'd':
-                    nonlocal day_of_month_in_format
-                    day_of_month_in_format = True
-            return self[format_char]
-        format = re_sub(r'%[-_0^#]*[0-9]*([OE]?\\?.?)', repl, format)
-        if day_of_month_in_format and not year_in_format:
-            import warnings
-            warnings.warn("""\
+                    nonlocal day_d_in_format
+                    day_d_in_format = True
+                case 'e':
+                    nonlocal day_e_in_format
+                    day_e_in_format = True
+            return self[directive]
+        format = re_sub(r'%[-_0^#]*[0-9]*([OE]?[:\\]?.?)', repl, format)
+        if not year_in_format:
+            if day_d_in_format:
+                raise ValueError(
+                    "Day of month directive '%d' may not be used without "
+                    "a year directive. Parsing dates involving a day of "
+                    "month without a year is ambiguous and fails to parse "
+                    "leap day. Add a year to the input and format. "
+                    "See https://github.com/python/cpython/issues/70647.")
+            if day_e_in_format:
+                import warnings
+                warnings.warn("""\
 Parsing dates involving a day of month without a year specified is ambiguous
-and fails to parse leap day. The default behavior will change in Python 3.15
-to either always raise an exception or to use a different default year (TBD).
-To avoid trouble, add a specific year to the input & format.
+and fails to parse leap day. '%e' without a year will become an error in Python 3.17.
+To avoid trouble, add a specific year to the input and format.
 See https://github.com/python/cpython/issues/70647.""",
-                          DeprecationWarning,
-                          skip_file_prefixes=(os.path.dirname(__file__),))
+                              DeprecationWarning,
+                              skip_file_prefixes=(os.path.dirname(__file__),))
         return format
 
     def compile(self, format):
@@ -514,9 +532,10 @@ def _calc_julian_from_U_or_W(year, week_of_year, day_of_week, week_starts_Mon):
 
 
 def _strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
-    """Return a 2-tuple consisting of a time struct and an int containing
-    the number of microseconds based on the input string and the
-    format string."""
+    """Return a 3-tuple consisting of a tuple with time components,
+    an int containing the number of microseconds, and an int
+    containing the microseconds part of the GMT offset, based on the
+    input string and the format string."""
 
     for index, arg in enumerate([data_string, format]):
         if not isinstance(arg, str):
@@ -555,8 +574,17 @@ def _strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
         raise ValueError("time data %r does not match format %r" %
                          (data_string, format))
     if len(data_string) != found.end():
-        raise ValueError("unconverted data remains: %s" %
-                          data_string[found.end():])
+        rest = data_string[found.end():]
+        # Specific check for '%:z' directive
+        if (
+            "colon_z" in found.re.groupindex
+            and found.group("colon_z") is not None
+            and rest[0] != ":"
+        ):
+            raise ValueError(
+                f"Missing colon in %:z before '{rest}', got '{data_string}'"
+            )
+        raise ValueError("unconverted data remains: %s" % rest)
 
     iso_year = year = None
     month = day = 1
@@ -616,18 +644,18 @@ def parse_int(s):
             hour = parse_int(found_dict['I'])
             ampm = found_dict.get('p', '').lower()
             # If there was no AM/PM indicator, we'll treat this like AM
-            if ampm in ('', locale_time.am_pm[0]):
-                # We're in AM so the hour is correct unless we're
-                # looking at 12 midnight.
-                # 12 midnight == 12 AM == hour 0
-                if hour == 12:
-                    hour = 0
-            elif ampm == locale_time.am_pm[1]:
+            if ampm == locale_time.am_pm[1]:
                 # We're in PM so we need to add 12 to the hour unless
                 # we're looking at 12 noon.
                 # 12 noon == 12 PM == hour 12
                 if hour != 12:
                     hour += 12
+            else:
+                # We're in AM so the hour is correct unless we're
+                # looking at 12 midnight.
+                # 12 midnight == 12 AM == hour 0
+                if hour == 12:
+                    hour = 0
         elif group_key == 'M':
             minute = parse_int(found_dict['M'])
         elif group_key == 'S':
@@ -662,29 +690,30 @@ def parse_int(s):
                 week_of_year_start = 0
         elif group_key == 'V':
             iso_week = int(found_dict['V'])
-        elif group_key == 'z':
-            z = found_dict['z']
-            if z == 'Z':
-                gmtoff = 0
-            else:
-                if z[3] == ':':
-                    z = z[:3] + z[4:]
-                    if len(z) > 5:
-                        if z[5] != ':':
-                            msg = f"Inconsistent use of : in {found_dict['z']}"
-                            raise ValueError(msg)
-                        z = z[:5] + z[6:]
-                hours = int(z[1:3])
-                minutes = int(z[3:5])
-                seconds = int(z[5:7] or 0)
-                gmtoff = (hours * 60 * 60) + (minutes * 60) + seconds
-                gmtoff_remainder = z[8:]
-                # Pad to always return microseconds.
-                gmtoff_remainder_padding = "0" * (6 - len(gmtoff_remainder))
-                gmtoff_fraction = int(gmtoff_remainder + gmtoff_remainder_padding)
-                if z.startswith("-"):
-                    gmtoff = -gmtoff
-                    gmtoff_fraction = -gmtoff_fraction
+        elif group_key in ('z', 'colon_z'):
+            z = found_dict[group_key]
+            if z:
+                if z == 'Z':
+                    gmtoff = 0
+                else:
+                    if z[3] == ':':
+                        z = z[:3] + z[4:]
+                        if len(z) > 5:
+                            if z[5] != ':':
+                                msg = f"Inconsistent use of : in {found_dict[group_key]}"
+                                raise ValueError(msg)
+                            z = z[:5] + z[6:]
+                    hours = int(z[1:3])
+                    minutes = int(z[3:5])
+                    seconds = int(z[5:7] or 0)
+                    gmtoff = (hours * 60 * 60) + (minutes * 60) + seconds
+                    gmtoff_remainder = z[8:]
+                    # Pad to always return microseconds.
+                    gmtoff_remainder_padding = "0" * (6 - len(gmtoff_remainder))
+                    gmtoff_fraction = int(gmtoff_remainder + gmtoff_remainder_padding)
+                    if z.startswith("-"):
+                        gmtoff = -gmtoff
+                        gmtoff_fraction = -gmtoff_fraction
         elif group_key == 'Z':
             # Since -1 is default value only need to worry about setting tz if
             # it can be something other than -1.
 
@@ -100,8 +100,8 @@
 
 try:
     from _decimal import *
-    from _decimal import __version__  # noqa: F401
     from _decimal import __libmpdec_version__  # noqa: F401
+    from _decimal import __getattr__  # noqa: F401
 except ImportError:
     import _pydecimal
     import sys
 
@@ -224,21 +224,58 @@ def lazycache(filename, module_globals):
 def _make_lazycache_entry(filename, module_globals):
     if not filename or (filename.startswith('<') and filename.endswith('>')):
         return None
-    # Try for a __loader__, if available
-    if module_globals and '__name__' in module_globals:
-        spec = module_globals.get('__spec__')
-        name = getattr(spec, 'name', None) or module_globals['__name__']
-        loader = getattr(spec, 'loader', None)
-        if loader is None:
-            loader = module_globals.get('__loader__')
-        get_source = getattr(loader, 'get_source', None)
-
-        if name and get_source:
-            def get_lines(name=name, *args, **kwargs):
-                return get_source(name, *args, **kwargs)
-            return (get_lines,)
-    return None
 
+    if module_globals is not None and not isinstance(module_globals, dict):
+        raise TypeError(f'module_globals must be a dict, not {type(module_globals).__qualname__}')
+    if not module_globals or '__name__' not in module_globals:
+        return None
+
+    spec = module_globals.get('__spec__')
+    name = getattr(spec, 'name', None) or module_globals['__name__']
+    if name is None:
+        return None
+
+    loader = _bless_my_loader(module_globals)
+    if loader is None:
+        return None
+
+    get_source = getattr(loader, 'get_source', None)
+    if get_source is None:
+        return None
+
+    def get_lines(name=name, *args, **kwargs):
+        return get_source(name, *args, **kwargs)
+    return (get_lines,)
+
+def _bless_my_loader(module_globals):
+    # Similar to _bless_my_loader() in importlib._bootstrap_external,
+    # but always emits warnings instead of errors.
+    loader = module_globals.get('__loader__')
+    if loader is None and '__spec__' not in module_globals:
+        return None
+    spec = module_globals.get('__spec__')
+
+    # The __main__ module has __spec__ = None.
+    if spec is None and module_globals.get('__name__') == '__main__':
+        return loader
+
+    spec_loader = getattr(spec, 'loader', None)
+    if spec_loader is None:
+        import warnings
+        warnings.warn(
+            'Module globals is missing a __spec__.loader',
+            DeprecationWarning)
+        return loader
+
+    assert spec_loader is not None
+    if loader is not None and loader != spec_loader:
+        import warnings
+        warnings.warn(
+            'Module globals; __loader__ != __spec__.loader',
+            DeprecationWarning)
+        return loader
+
+    return spec_loader
 
 
 def _register_code(code, string, name):