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/3942#issuecomment-965595392,https://api.github.com/repos/pydata/xarray/issues/3942,965595392,IC_kwDOAMm_X845jdEA,460756,2021-11-10T17:56:41Z,2021-11-10T17:57:17Z,NONE,"Cool, I agree that an error and a documentation change is likely to be sufficient :slightly_smiling_face:  (and I'd be keen to write a PR to help out!)

But, before we commit to that path:  Please may I ask:  Why not default to xarray encoding time as `'units': 'nanoseconds since 1970-01-01'` to be consistent with `np.datetime64[ns]`?   Sorry if I've missed something obvious!","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,595492608
https://github.com/pydata/xarray/issues/3942#issuecomment-965562434,https://api.github.com/repos/pydata/xarray/issues/3942,965562434,IC_kwDOAMm_X845jVBC,460756,2021-11-10T17:17:29Z,2021-11-10T17:49:22Z,NONE,"I think I've bumped into a symptom of this issue (my issue is described in #5969).  And I think #3379 may be another symptom of this issue.

Perhaps I'm biased (because I work with timeseries which only span a few years) but I wonder if xarray should default to encoding time as `'units': 'nanoseconds since 1970-01-01'` (to be consistent with `np.datetime64[ns]`) unless the timeseries includes dates before the year 1677, or after the year 2262 :slightly_smiling_face:?  Would that work?

If that's no good, then let's definitely add a note to the documentation to say that it might be a good idea for users to manually specify the encoding for datetimes if they wish to append to Zarrs.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,595492608