id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
707745196,MDExOlB1bGxSZXF1ZXN0NDkyMDk1NzEw,4454,Raise error when datetime64 or timedelta64 values that are outside the valid range for ns precision are converted to ns precision,22488770,closed,0,,,11,2020-09-23T23:36:14Z,2020-09-30T18:56:45Z,2020-09-30T00:49:35Z,CONTRIBUTOR,,0,pydata/xarray/pulls/4454,"Use _possibly_convert_obhects to raise an error when converting datetime64 or timedelta64 objects that are in some units other than ns to ns as per pandas requirements, resulting in dates outside the valid range for ns precision being silently changed to incorrect values.

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 - [x] Closes #4427 
 - [x] Passes `isort . && black . && mypy . && flake8`
 - [x] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
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