html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/615#issuecomment-146975622,https://api.github.com/repos/pydata/xarray/issues/615,146975622,MDEyOklzc3VlQ29tbWVudDE0Njk3NTYyMg==,2443309,2015-10-09T20:10:45Z,2015-10-09T20:10:45Z,MEMBER,"Do you have to use `pd.to_timedelta()`?  This seems to work:

``` Python
a = xray.Dataset({'time': [datetime(2000, 1, 1)]})
a['time'] -= np.timedelta64(timedelta(hours=6))
```
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