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/1621#issuecomment-1114119503,https://api.github.com/repos/pydata/xarray/issues/1621,1114119503,IC_kwDOAMm_X85CaB1P,26384082,2022-05-01T03:37:48Z,2022-05-01T03:37:48Z,NONE,"In order to maintain a list of currently relevant issues, we mark issues as stale after a period of inactivity

If this issue remains relevant, please comment here or remove the `stale` label; otherwise it will be marked as closed automatically
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264321376
https://github.com/pydata/xarray/issues/1621#issuecomment-604516472,https://api.github.com/repos/pydata/xarray/issues/1621,604516472,MDEyOklzc3VlQ29tbWVudDYwNDUxNjQ3Mg==,26384082,2020-03-26T16:02:59Z,2020-03-26T16:02:59Z,NONE,"In order to maintain a list of currently relevant issues, we mark issues as stale after a period of inactivity

If this issue remains relevant, please comment here or remove the `stale` label; otherwise it will be marked as closed automatically
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264321376
https://github.com/pydata/xarray/issues/1621#issuecomment-339093278,https://api.github.com/repos/pydata/xarray/issues/1621,339093278,MDEyOklzc3VlQ29tbWVudDMzOTA5MzI3OA==,1872600,2017-10-24T18:50:21Z,2017-10-24T18:50:21Z,NONE,I vote for `1` also.  How many makes a quorum?   :smile_cat: ,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264321376
https://github.com/pydata/xarray/issues/1621#issuecomment-338172936,https://api.github.com/repos/pydata/xarray/issues/1621,338172936,MDEyOklzc3VlQ29tbWVudDMzODE3MjkzNg==,1872600,2017-10-20T10:46:53Z,2017-10-20T10:50:18Z,NONE,"On https://stackoverflow.com/a/46675990/2005869, @shoyer explains: 
> My understanding of CF standard names is that `forecast_period` should be equal to the difference between time and `forecast_reference_time`, i.e., `forecast_period` = `time` - `forecast_reference_time`. If you specified your `time_offset` variable with units in the form ""hours"", then it would be decoded to `timedelta64`, along with `datetime64` for time and time_run, so xarray's arithmetic would actually satisfy this identity. You might find this useful if you only wanted to include two of these variables and wanted to calculate the third on the fly.   On the other hand, you probably don't want to convert the `Tper` variable to `timedelta64`. Technically, it is also a time period, but it's not a variable that makes sense to compare to time.

I understand the potential issue here, but I think Xarray should follow [CF conventions for time](http://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/cf-conventions.html#time-coordinate), and only treat variables as time coordinates if they have valid CF time units (`<time unit> since <date>`).     

We know of thousands of datasets  (every dataset with waves!) where the current Xarray behavior is a problem. ","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264321376
https://github.com/pydata/xarray/issues/1621#issuecomment-335609801,https://api.github.com/repos/pydata/xarray/issues/1621,335609801,MDEyOklzc3VlQ29tbWVudDMzNTYwOTgwMQ==,4701070,2017-10-10T21:12:50Z,2017-10-10T21:12:50Z,NONE,"Thanks @shoyer. I understand the issue better now. Had not considered timedeltas. That does conflate the issue. No sure-fire solution, then, so I'll continue with the workaround. Cheers.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264321376