diff --git a/doc/source/reference/offset_frequency.rst b/doc/source/reference/offset_frequency.rst
index 9b2753ca02495..fb262af1e63f6 100644
--- a/doc/source/reference/offset_frequency.rst
+++ b/doc/source/reference/offset_frequency.rst
@@ -25,6 +25,7 @@ Properties
     DateOffset.nanos
     DateOffset.normalize
     DateOffset.rule_code
+    DateOffset.n
 
 Methods
 ~~~~~~~
@@ -57,6 +58,7 @@ Properties
     BusinessDay.nanos
     BusinessDay.normalize
     BusinessDay.rule_code
+    BusinessDay.n
 
 Methods
 ~~~~~~~
@@ -90,6 +92,7 @@ Properties
     BusinessHour.nanos
     BusinessHour.normalize
     BusinessHour.rule_code
+    BusinessHour.n
 
 Methods
 ~~~~~~~
@@ -122,6 +125,7 @@ Properties
     CustomBusinessDay.nanos
     CustomBusinessDay.normalize
     CustomBusinessDay.rule_code
+    CustomBusinessDay.n
 
 Methods
 ~~~~~~~
@@ -154,6 +158,7 @@ Properties
     CustomBusinessHour.nanos
     CustomBusinessHour.normalize
     CustomBusinessHour.rule_code
+    CustomBusinessHour.n
 
 Methods
 ~~~~~~~
@@ -186,6 +191,7 @@ Properties
     MonthOffset.nanos
     MonthOffset.normalize
     MonthOffset.rule_code
+    MonthOffset.n
 
 Methods
 ~~~~~~~
@@ -219,6 +225,7 @@ Properties
     MonthEnd.nanos
     MonthEnd.normalize
     MonthEnd.rule_code
+    MonthEnd.n
 
 Methods
 ~~~~~~~
@@ -252,6 +259,7 @@ Properties
     MonthBegin.nanos
     MonthBegin.normalize
     MonthBegin.rule_code
+    MonthBegin.n
 
 Methods
 ~~~~~~~
@@ -285,6 +293,7 @@ Properties
     BusinessMonthEnd.nanos
     BusinessMonthEnd.normalize
     BusinessMonthEnd.rule_code
+    BusinessMonthEnd.n
 
 Methods
 ~~~~~~~
@@ -318,6 +327,7 @@ Properties
     BusinessMonthBegin.nanos
     BusinessMonthBegin.normalize
     BusinessMonthBegin.rule_code
+    BusinessMonthBegin.n
 
 Methods
 ~~~~~~~
@@ -352,6 +362,7 @@ Properties
     CustomBusinessMonthEnd.nanos
     CustomBusinessMonthEnd.normalize
     CustomBusinessMonthEnd.rule_code
+    CustomBusinessMonthEnd.n
 
 Methods
 ~~~~~~~
@@ -385,6 +396,7 @@ Properties
     CustomBusinessMonthBegin.nanos
     CustomBusinessMonthBegin.normalize
     CustomBusinessMonthBegin.rule_code
+    CustomBusinessMonthBegin.n
 
 Methods
 ~~~~~~~
@@ -417,6 +429,7 @@ Properties
     SemiMonthOffset.nanos
     SemiMonthOffset.normalize
     SemiMonthOffset.rule_code
+    SemiMonthOffset.n
 
 Methods
 ~~~~~~~
@@ -450,6 +463,7 @@ Properties
     SemiMonthEnd.nanos
     SemiMonthEnd.normalize
     SemiMonthEnd.rule_code
+    SemiMonthEnd.n
 
 Methods
 ~~~~~~~
@@ -483,6 +497,7 @@ Properties
     SemiMonthBegin.nanos
     SemiMonthBegin.normalize
     SemiMonthBegin.rule_code
+    SemiMonthBegin.n
 
 Methods
 ~~~~~~~
@@ -516,6 +531,7 @@ Properties
     Week.nanos
     Week.normalize
     Week.rule_code
+    Week.n
 
 Methods
 ~~~~~~~
@@ -549,6 +565,7 @@ Properties
     WeekOfMonth.nanos
     WeekOfMonth.normalize
     WeekOfMonth.rule_code
+    WeekOfMonth.n
 
 Methods
 ~~~~~~~
@@ -581,6 +598,7 @@ Properties
     LastWeekOfMonth.nanos
     LastWeekOfMonth.normalize
     LastWeekOfMonth.rule_code
+    LastWeekOfMonth.n
 
 Methods
 ~~~~~~~
@@ -613,6 +631,7 @@ Properties
     QuarterOffset.nanos
     QuarterOffset.normalize
     QuarterOffset.rule_code
+    QuarterOffset.n
 
 Methods
 ~~~~~~~
@@ -646,6 +665,7 @@ Properties
     BQuarterEnd.nanos
     BQuarterEnd.normalize
     BQuarterEnd.rule_code
+    BQuarterEnd.n
 
 Methods
 ~~~~~~~
@@ -679,6 +699,7 @@ Properties
     BQuarterBegin.nanos
     BQuarterBegin.normalize
     BQuarterBegin.rule_code
+    BQuarterBegin.n
 
 Methods
 ~~~~~~~
@@ -712,6 +733,7 @@ Properties
     QuarterEnd.nanos
     QuarterEnd.normalize
     QuarterEnd.rule_code
+    QuarterEnd.n
 
 Methods
 ~~~~~~~
@@ -745,6 +767,7 @@ Properties
     QuarterBegin.nanos
     QuarterBegin.normalize
     QuarterBegin.rule_code
+    QuarterBegin.n
 
 Methods
 ~~~~~~~
@@ -778,6 +801,7 @@ Properties
     YearOffset.nanos
     YearOffset.normalize
     YearOffset.rule_code
+    YearOffset.n
 
 Methods
 ~~~~~~~
@@ -811,6 +835,7 @@ Properties
     BYearEnd.nanos
     BYearEnd.normalize
     BYearEnd.rule_code
+    BYearEnd.n
 
 Methods
 ~~~~~~~
@@ -844,6 +869,7 @@ Properties
     BYearBegin.nanos
     BYearBegin.normalize
     BYearBegin.rule_code
+    BYearBegin.n
 
 Methods
 ~~~~~~~
@@ -877,6 +903,7 @@ Properties
     YearEnd.nanos
     YearEnd.normalize
     YearEnd.rule_code
+    YearEnd.n
 
 Methods
 ~~~~~~~
@@ -910,6 +937,7 @@ Properties
     YearBegin.nanos
     YearBegin.normalize
     YearBegin.rule_code
+    YearBegin.n
 
 Methods
 ~~~~~~~
@@ -943,6 +971,7 @@ Properties
     FY5253.nanos
     FY5253.normalize
     FY5253.rule_code
+    FY5253.n
 
 Methods
 ~~~~~~~
@@ -977,6 +1006,7 @@ Properties
     FY5253Quarter.nanos
     FY5253Quarter.normalize
     FY5253Quarter.rule_code
+    FY5253Quarter.n
 
 Methods
 ~~~~~~~
@@ -1011,6 +1041,7 @@ Properties
     Easter.nanos
     Easter.normalize
     Easter.rule_code
+    Easter.n
 
 Methods
 ~~~~~~~
@@ -1317,6 +1348,7 @@ Properties
     BDay.normalize
     BDay.offset
     BDay.rule_code
+    BDay.n
 
 Methods
 ~~~~~~~
@@ -1353,6 +1385,7 @@ Properties
     BMonthEnd.nanos
     BMonthEnd.normalize
     BMonthEnd.rule_code
+    BMonthEnd.n
 
 Methods
 ~~~~~~~
@@ -1389,6 +1422,7 @@ Properties
     BMonthBegin.nanos
     BMonthBegin.normalize
     BMonthBegin.rule_code
+    BMonthBegin.n
 
 Methods
 ~~~~~~~
@@ -1429,6 +1463,7 @@ Properties
     CBMonthEnd.normalize
     CBMonthEnd.offset
     CBMonthEnd.rule_code
+    CBMonthEnd.n
 
 Methods
 ~~~~~~~
@@ -1469,6 +1504,7 @@ Properties
     CBMonthBegin.normalize
     CBMonthBegin.offset
     CBMonthBegin.rule_code
+    CBMonthBegin.n
 
 Methods
 ~~~~~~~
@@ -1506,6 +1542,7 @@ Properties
     CDay.normalize
     CDay.offset
     CDay.rule_code
+    CDay.n
 
 Methods
 ~~~~~~~
diff --git a/pandas/_libs/tslibs/base.pxd b/pandas/_libs/tslibs/base.pxd
index d32413c3bad86..0521279025d4f 100644
--- a/pandas/_libs/tslibs/base.pxd
+++ b/pandas/_libs/tslibs/base.pxd
@@ -8,13 +8,8 @@ cdef class ABCTimestamp(datetime):
     pass
 
 
-cdef class ABCTick:
-    pass
-
-
 cdef class ABCPeriod:
     pass
 
 
-cdef bint is_tick_object(object obj)
 cdef bint is_period_object(object obj)
diff --git a/pandas/_libs/tslibs/base.pyx b/pandas/_libs/tslibs/base.pyx
index 59daba4510b6e..91178fe3933f7 100644
--- a/pandas/_libs/tslibs/base.pyx
+++ b/pandas/_libs/tslibs/base.pyx
@@ -20,13 +20,5 @@ cdef class ABCPeriod:
     pass
 
 
-cdef class ABCTick:
-    pass
-
-
-cdef bint is_tick_object(object obj):
-    return isinstance(obj, ABCTick)
-
-
 cdef bint is_period_object(object obj):
     return isinstance(obj, ABCPeriod)
diff --git a/pandas/_libs/tslibs/offsets.pxd b/pandas/_libs/tslibs/offsets.pxd
index c6afb557ba2ef..e75cd8bdf1baf 100644
--- a/pandas/_libs/tslibs/offsets.pxd
+++ b/pandas/_libs/tslibs/offsets.pxd
@@ -1,2 +1,3 @@
 cdef to_offset(object obj)
 cdef bint is_offset_object(object obj)
+cdef bint is_tick_object(object obj)
diff --git a/pandas/_libs/tslibs/offsets.pyx b/pandas/_libs/tslibs/offsets.pyx
index c113897e4fe82..b25558e8572fe 100644
--- a/pandas/_libs/tslibs/offsets.pyx
+++ b/pandas/_libs/tslibs/offsets.pyx
@@ -21,7 +21,7 @@ cnp.import_array()
 from pandas._libs.tslibs cimport util
 from pandas._libs.tslibs.util cimport is_integer_object, is_datetime64_object
 
-from pandas._libs.tslibs.base cimport ABCTick, ABCTimestamp, is_tick_object
+from pandas._libs.tslibs.base cimport ABCTimestamp
 
 from pandas._libs.tslibs.ccalendar import MONTHS, DAYS, weekday_to_int, int_to_weekday
 from pandas._libs.tslibs.ccalendar cimport get_days_in_month, dayofweek
@@ -35,13 +35,9 @@ from pandas._libs.tslibs.np_datetime cimport (
 from pandas._libs.tslibs.timezones cimport utc_pytz as UTC
 from pandas._libs.tslibs.tzconversion cimport tz_convert_single
 
-from pandas._libs.tslibs.timedeltas import Timedelta
-from pandas._libs.tslibs.timestamps import Timestamp
-
 # ---------------------------------------------------------------------
 # Constants
 
-
 _offset_to_period_map = {
     'WEEKDAY': 'D',
     'EOM': 'M',
@@ -94,6 +90,10 @@ cdef bint is_offset_object(object obj):
     return isinstance(obj, _BaseOffset)
 
 
+cdef bint is_tick_object(object obj):
+    return isinstance(obj, _Tick)
+
+
 cdef to_offset(object obj):
     """
     Wrap pandas.tseries.frequencies.to_offset to keep centralize runtime
@@ -157,6 +157,8 @@ def apply_wraps(func):
     # not play nicely with cython class methods
 
     def wrapper(self, other):
+        from pandas import Timestamp
+
         if other is NaT:
             return NaT
         elif isinstance(other, (timedelta, BaseOffset)):
@@ -396,7 +398,7 @@ class ApplyTypeError(TypeError):
 # ---------------------------------------------------------------------
 # Base Classes
 
-class _BaseOffset:
+cdef class _BaseOffset:
     """
     Base class for DateOffset methods that are not overridden by subclasses
     and will (after pickle errors are resolved) go into a cdef class.
@@ -407,16 +409,17 @@ class _BaseOffset:
     _use_relativedelta = False
     _adjust_dst = True
     _deprecations = frozenset(["isAnchored", "onOffset"])
-    normalize = False  # default for prior pickles
+
+    cdef readonly:
+        int64_t n
+        bint normalize
+        dict _cache
 
     def __init__(self, n=1, normalize=False):
         n = self._validate_n(n)
-        object.__setattr__(self, "n", n)
-        object.__setattr__(self, "normalize", normalize)
-        object.__setattr__(self, "_cache", {})
-
-    def __setattr__(self, name, value):
-        raise AttributeError("DateOffset objects are immutable.")
+        self.n = n
+        self.normalize = normalize
+        self._cache = {}
 
     def __eq__(self, other: Any) -> bool:
         if isinstance(other, str):
@@ -447,6 +450,8 @@ class _BaseOffset:
         """
         # NB: non-cython subclasses override property with cache_readonly
         all_paras = self.__dict__.copy()
+        all_paras["n"] = self.n
+        all_paras["normalize"] = self.normalize
         if 'holidays' in all_paras and not all_paras['holidays']:
             all_paras.pop('holidays')
         exclude = ['kwds', 'name', 'calendar']
@@ -613,6 +618,7 @@ class _BaseOffset:
         TimeStamp
             Rolled timestamp if not on offset, otherwise unchanged timestamp.
         """
+        from pandas import Timestamp
         dt = Timestamp(dt)
         if not self.is_on_offset(dt):
             dt = dt - type(self)(1, normalize=self.normalize, **self.kwds)
@@ -627,6 +633,7 @@ class _BaseOffset:
         TimeStamp
             Rolled timestamp if not on offset, otherwise unchanged timestamp.
         """
+        from pandas import Timestamp
         dt = Timestamp(dt)
         if not self.is_on_offset(dt):
             dt = dt + type(self)(1, normalize=self.normalize, **self.kwds)
@@ -696,9 +703,9 @@ class _BaseOffset:
             kwds = {key: odict[key] for key in odict if odict[key]}
             state.update(kwds)
 
-        if '_cache' not in state:
-            state['_cache'] = {}
-
+        self.n = state.pop("n")
+        self.normalize = state.pop("normalize")
+        self._cache = state.pop("_cache", {})
         self.__dict__.update(state)
 
         if 'weekmask' in state and 'holidays' in state:
@@ -711,6 +718,8 @@ class _BaseOffset:
     def __getstate__(self):
         """Return a pickleable state"""
         state = self.__dict__.copy()
+        state["n"] = self.n
+        state["normalize"] = self.normalize
 
         # we don't want to actually pickle the calendar object
         # as its a np.busyday; we recreate on deserialization
@@ -761,7 +770,7 @@ class BaseOffset(_BaseOffset):
         return (-self).__add__(other)
 
 
-cdef class _Tick(ABCTick):
+cdef class _Tick(_BaseOffset):
     """
     dummy class to mix into tseries.offsets.Tick so that in tslibs.period we
     can do isinstance checks on _Tick and avoid importing tseries.offsets
@@ -770,17 +779,11 @@ cdef class _Tick(ABCTick):
     # ensure that reversed-ops with numpy scalars return NotImplemented
     __array_priority__ = 1000
     _adjust_dst = False
-    _inc = Timedelta(microseconds=1000)
     _prefix = "undefined"
     _attributes = frozenset(["n", "normalize"])
 
-    cdef readonly:
-        int64_t n
-        bint normalize
-        dict _cache
-
     def __init__(self, n=1, normalize=False):
-        n = _BaseOffset._validate_n(n)
+        n = self._validate_n(n)
         self.n = n
         self.normalize = False
         self._cache = {}
@@ -791,7 +794,7 @@ cdef class _Tick(ABCTick):
             )
 
     @property
-    def delta(self) -> Timedelta:
+    def delta(self):
         return self.n * self._inc
 
     @property
diff --git a/pandas/_libs/tslibs/period.pyx b/pandas/_libs/tslibs/period.pyx
index 8af467c3b0950..380231129c9b2 100644
--- a/pandas/_libs/tslibs/period.pyx
+++ b/pandas/_libs/tslibs/period.pyx
@@ -37,7 +37,7 @@ cdef extern from "src/datetime/np_datetime.h":
 
 cimport pandas._libs.tslibs.util as util
 
-from pandas._libs.tslibs.base cimport ABCPeriod, is_period_object, is_tick_object
+from pandas._libs.tslibs.base cimport ABCPeriod, is_period_object
 
 from pandas._libs.tslibs.timestamps import Timestamp
 from pandas._libs.tslibs.timezones cimport is_utc, is_tzlocal, get_dst_info
@@ -68,7 +68,7 @@ from pandas._libs.tslibs.nattype cimport (
     c_NaT as NaT,
     c_nat_strings as nat_strings,
 )
-from pandas._libs.tslibs.offsets cimport to_offset
+from pandas._libs.tslibs.offsets cimport to_offset, is_tick_object
 from pandas._libs.tslibs.tzconversion cimport tz_convert_utc_to_tzlocal
 
 
diff --git a/pandas/_libs/tslibs/timedeltas.pyx b/pandas/_libs/tslibs/timedeltas.pyx
index 7a3af169a960e..c336e5f990f9a 100644
--- a/pandas/_libs/tslibs/timedeltas.pyx
+++ b/pandas/_libs/tslibs/timedeltas.pyx
@@ -21,7 +21,7 @@ from pandas._libs.tslibs.util cimport (
     is_float_object, is_array
 )
 
-from pandas._libs.tslibs.base cimport ABCTimedelta, ABCTimestamp, is_tick_object
+from pandas._libs.tslibs.base cimport ABCTimedelta, ABCTimestamp
 
 from pandas._libs.tslibs.ccalendar cimport DAY_NANOS
 
@@ -34,6 +34,7 @@ from pandas._libs.tslibs.nattype cimport (
     c_NaT as NaT,
     c_nat_strings as nat_strings,
 )
+from pandas._libs.tslibs.offsets cimport is_tick_object
 
 # ----------------------------------------------------------------------
 # Constants
diff --git a/pandas/_libs/tslibs/timestamps.pyx b/pandas/_libs/tslibs/timestamps.pyx
index 4f8b85240c79f..d4a1a52019503 100644
--- a/pandas/_libs/tslibs/timestamps.pyx
+++ b/pandas/_libs/tslibs/timestamps.pyx
@@ -25,7 +25,7 @@ from pandas._libs.tslibs.util cimport (
     is_timedelta64_object, is_array,
 )
 
-from pandas._libs.tslibs.base cimport ABCTimedelta, ABCTimestamp, is_tick_object
+from pandas._libs.tslibs.base cimport ABCTimedelta, ABCTimestamp
 
 from pandas._libs.tslibs cimport ccalendar
 
@@ -40,7 +40,7 @@ from pandas._libs.tslibs.np_datetime cimport (
     cmp_scalar,
 )
 from pandas._libs.tslibs.np_datetime import OutOfBoundsDatetime
-from pandas._libs.tslibs.offsets cimport to_offset
+from pandas._libs.tslibs.offsets cimport to_offset, is_tick_object
 from pandas._libs.tslibs.timedeltas import Timedelta
 from pandas._libs.tslibs.timezones cimport (
     is_utc, maybe_get_tz, treat_tz_as_pytz, utc_pytz as UTC,
diff --git a/pandas/compat/pickle_compat.py b/pandas/compat/pickle_compat.py
index cd2ded874c08c..8a2626f9a7e68 100644
--- a/pandas/compat/pickle_compat.py
+++ b/pandas/compat/pickle_compat.py
@@ -2,14 +2,16 @@
 Support pre-0.12 series pickle compatibility.
 """
 
+import contextlib
 import copy
+import io
 import pickle as pkl
 from typing import TYPE_CHECKING, Optional
 import warnings
 
 from pandas import Index
 
-from pandas.tseries.offsets import Tick
+from pandas.tseries.offsets import DateOffset
 
 if TYPE_CHECKING:
     from pandas import Series, DataFrame
@@ -40,7 +42,7 @@ def load_reduce(self):
                 return
             except TypeError:
                 pass
-        elif args and issubclass(args[0], Tick):
+        elif args and issubclass(args[0], DateOffset):
             # TypeError: object.__new__(Day) is not safe, use Day.__new__()
             cls = args[0]
             stack[-1] = cls.__new__(*args)
@@ -247,3 +249,32 @@ def load(fh, encoding: Optional[str] = None, is_verbose: bool = False):
         return up.load()
     except (ValueError, TypeError):
         raise
+
+
+def loads(
+    bytes_object: bytes,
+    *,
+    fix_imports: bool = True,
+    encoding: str = "ASCII",
+    errors: str = "strict",
+):
+    """
+    Analogous to pickle._loads.
+    """
+    fd = io.BytesIO(bytes_object)
+    return Unpickler(
+        fd, fix_imports=fix_imports, encoding=encoding, errors=errors
+    ).load()
+
+
+@contextlib.contextmanager
+def patch_pickle():
+    """
+    Temporarily patch pickle to use our unpickler.
+    """
+    orig_loads = pkl.loads
+    try:
+        pkl.loads = loads
+        yield
+    finally:
+        pkl.loads = orig_loads
diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
index 85fcfd107b121..36cd61b6c3adb 100644
--- a/pandas/io/pytables.py
+++ b/pandas/io/pytables.py
@@ -2,7 +2,6 @@
 High level interface to PyTables for reading and writing pandas data structures
 to disk
 """
-
 import copy
 from datetime import date, tzinfo
 import itertools
@@ -19,6 +18,7 @@
 from pandas._libs.tslibs import timezones
 from pandas._typing import ArrayLike, FrameOrSeries, Label
 from pandas.compat._optional import import_optional_dependency
+from pandas.compat.pickle_compat import patch_pickle
 from pandas.errors import PerformanceWarning
 from pandas.util._decorators import cache_readonly
 
@@ -729,10 +729,13 @@ def get(self, key: str):
         object
             Same type as object stored in file.
         """
-        group = self.get_node(key)
-        if group is None:
-            raise KeyError(f"No object named {key} in the file")
-        return self._read_group(group)
+        with patch_pickle():
+            # GH#31167 Without this patch, pickle doesn't know how to unpickle
+            #  old DateOffset objects now that they are cdef classes.
+            group = self.get_node(key)
+            if group is None:
+                raise KeyError(f"No object named {key} in the file")
+            return self._read_group(group)
 
     def select(
         self,
diff --git a/pandas/tseries/offsets.py b/pandas/tseries/offsets.py
index 88f77a8d7f054..364a50be5c291 100644
--- a/pandas/tseries/offsets.py
+++ b/pandas/tseries/offsets.py
@@ -185,8 +185,6 @@ def __add__(date):
     Timestamp('2017-03-01 09:10:11')
     """
 
-    _params = cache_readonly(BaseOffset._params.fget)
-    freqstr = cache_readonly(BaseOffset.freqstr.fget)
     _attributes = frozenset(["n", "normalize"] + list(liboffsets.relativedelta_kwds))
     _adjust_dst = False
 
@@ -295,11 +293,18 @@ def is_on_offset(self, dt):
         # TODO, see #1395
         return True
 
+    @cache_readonly
+    def _params(self):
+        # TODO: see if we can just write cache_readonly(BaseOffset._params.__get__)
+        return BaseOffset._params.__get__(self)
 
-class SingleConstructorMixin:
-    _params = cache_readonly(BaseOffset._params.fget)
-    freqstr = cache_readonly(BaseOffset.freqstr.fget)
+    @cache_readonly
+    def freqstr(self):
+        # TODO: see if we can just write cache_readonly(BaseOffset.freqstr.__get__)
+        return BaseOffset.freqstr.__get__(self)
 
+
+class SingleConstructorMixin:
     @classmethod
     def _from_name(cls, suffix=None):
         # default _from_name calls cls with no args
@@ -307,6 +312,16 @@ def _from_name(cls, suffix=None):
             raise ValueError(f"Bad freq suffix {suffix}")
         return cls()
 
+    @cache_readonly
+    def _params(self):
+        # TODO: see if we can just write cache_readonly(BaseOffset._params.__get__)
+        return BaseOffset._params.__get__(self)
+
+    @cache_readonly
+    def freqstr(self):
+        # TODO: see if we can just write cache_readonly(BaseOffset.freqstr.__get__)
+        return BaseOffset.freqstr.__get__(self)
+
 
 class SingleConstructorOffset(SingleConstructorMixin, BaseOffset):
     pass
@@ -320,6 +335,10 @@ class BusinessDay(BusinessMixin, SingleConstructorOffset):
     _prefix = "B"
     _attributes = frozenset(["n", "normalize", "offset"])
 
+    def __reduce__(self):
+        tup = (self.n, self.normalize, self.offset)
+        return type(self), tup
+
     def _offset_str(self) -> str:
         def get_str(td):
             off_str = ""
@@ -710,6 +729,12 @@ class CustomBusinessDay(CustomMixin, BusinessDay):
         ["n", "normalize", "weekmask", "holidays", "calendar", "offset"]
     )
 
+    def __reduce__(self):
+        # np.holidaycalendar cant be pickled, so pass None there and
+        #  it will be re-constructed within __init__
+        tup = (self.n, self.normalize, self.weekmask, self.holidays, None, self.offset)
+        return type(self), tup
+
     def __init__(
         self,
         n=1,
@@ -2104,6 +2129,8 @@ def is_on_offset(self, dt: datetime) -> bool:
 
 
 class Tick(liboffsets._Tick, SingleConstructorOffset):
+    _inc = Timedelta(microseconds=1000)
+
     def __add__(self, other):
         if isinstance(other, Tick):
             if type(self) == type(other):