Release 2025.01.2

[kmuehlbauer]

What is your issue?

This issue tracks the release for allowing non-nanosecond datetimes/timedeltas (adapting to pandas) behaviour. We aimed for a release in January, so there quite some references to that release in the codebase/docs.

Must have:

• Enable passing a CFTimedeltaCoder to decode_timedelta #9966
• Fix infer_freq, check for subdtype "datetime64"/"timedelta64" #9999
• Revert "Use flox for grouped first, last (#9986)" #10001
• Use freq="D" instead of freq="d" in pd.timedelta_range #10004
• Doctest failing with numpy 2.1.3 #10005
• remove outdated type-ignores #10006
• tbc

Nice to have:

• Preserve order of variables in combine_by_coords #9070
• Add FAQ answer about API stability & backwards compatibility #9855
• tbc

I'll start preparing release tomorrow. @pydata/xarray please add items as needed. Also raise concerns about the release date, if there are any.

[dcherian]

@aulemahal @Zeitsperre can you confirm that the xclim test suite is not failing after our switch to support non-nanosecond datetimes please?