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BUG: tz_localize(None) with Arrow timestamp

Arrowpyarrow functionalitypyarrow functionality

Bug

DatetimeDatetime data dtypeDatetime data dtype

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#61780 In pandas-dev/pandas;

· jbrockmendel opened on Jul 4, 2025

TST: test_on_offset_implementations failing on WASM on CI

Testingpandas testing functions or related to the test suitepandas testing functions or related to the test suite

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#60205 In pandas-dev/pandas;

· mroeschke opened on Nov 6, 2024

BUG: Timestamp.tz and DatetimeIndex.tz are inconsistent when pytz 2024.2 is installed

Closing CandidateMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

Compatpandas objects compatability with Numpy or Python functionspandas objects compatability with Numpy or Python functions

DependenciesRequired and optional dependenciesRequired and optional dependencies

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#59833 In pandas-dev/pandas;

· boschmic opened on Sep 18, 2024

BUG: tz-aware series with NaT raises exception on .to_numpy("datetime64")

Bug

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#59772 In pandas-dev/pandas;

· Ranfir opened on Sep 10, 2024

BUG: .max() raises exception on Series with object dtype and mixture of Timestamp and NaT: TypeError: '>=' not supported between instances of 'Timestamp' and 'float'

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#58707 In pandas-dev/pandas;

· kerrickstaley opened on May 13, 2024

BUG: pyarrow.Array.from_pandas converts empty timestamp[s][pyarrow, UTC] pandas Series to ChunkedArray, not TimestampArray

Arrowpyarrow functionalitypyarrow functionality

Bug

TimezonesTimezone data dtypeTimezone data dtype

Upstream issueIssue related to pandas dependencyIssue related to pandas dependency

Status: Open.

#57840 In pandas-dev/pandas;

· Wainberg opened on Mar 14, 2024

BUG: pandas 2.2.0 <code>DataFrame.groupby</code> regression when group labels of type <code>pd.Timestamp</code>

Bug

IndexRelated to the Index class or subclassesRelated to the Index class or subclasses

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#57192 In pandas-dev/pandas;

· maread99 opened on Feb 1, 2024

PERF: timezoned series created 6x faster than non-timezoned series

ConstructorsSeries/DataFrame/Index/pd.array ConstructorsSeries/DataFrame/Index/pd.array Constructors

PerformanceMemory or execution speed performanceMemory or execution speed performance

Timestamppd.Timestamp and associated methodspd.Timestamp and associated methods

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#56860 In pandas-dev/pandas;

· soerenwolfers opened on Jan 13, 2024

BUG: Timestamp.fromisoformat drops ISO 8601 timezone information

Bug

Timestamppd.Timestamp and associated methodspd.Timestamp and associated methods

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#56398 In pandas-dev/pandas;

· kohlerjl opened on Dec 8, 2023

BUG: Pyarrow backend fails to export index with timezone <code>ArrowInvalid</code> exception

Arrowpyarrow functionalitypyarrow functionality

Bug

TimezonesTimezone data dtypeTimezone data dtype

Upstream issueIssue related to pandas dependencyIssue related to pandas dependency

Status: Open.

#56282 In pandas-dev/pandas;

· mattharrison opened on Dec 1, 2023

API: make Day preserve time-of-day across DST transitions

FrequencyDateOffsetsDateOffsets

Stale

TimezonesTimezone data dtypeTimezone data dtype

Status: Open (in progress).

pandas-dev/pandasnumber 55502

#55502 In pandas-dev/pandas;

· jbrockmendel opened on Oct 12, 2023

BUG: Inconsistent behavior of <code>Series.values</code> with <code>Series.array</code> or <code>Series.to_numpy()</code>

Bug

Needs TriageIssue that has not been reviewed by a pandas team memberIssue that has not been reviewed by a pandas team member

TimezonesTimezone data dtypeTimezone data dtype

Status: Open.

#55128 In pandas-dev/pandas;

· anmyachev opened on Sep 13, 2023