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/pull/1252#issuecomment-388649761,https://api.github.com/repos/pydata/xarray/issues/1252,388649761,MDEyOklzc3VlQ29tbWVudDM4ODY0OTc2MQ==,6200806,2018-05-13T19:21:41Z,2018-05-13T19:21:41Z,CONTRIBUTOR,"Credit also due to @rabernat for organizing the workshop in late 2016 where this effort got off the ground, and to @shoyer who sketched out an initial roadmap for the implementation at that meeting.  

So excited to have this in!  In aospy alone, we'll be able to get rid of 100s (1000+?) of lines of code now that CFTime is in place.","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,205473898
https://github.com/pydata/xarray/pull/1252#issuecomment-380580598,https://api.github.com/repos/pydata/xarray/issues/1252,380580598,MDEyOklzc3VlQ29tbWVudDM4MDU4MDU5OA==,5179430,2018-04-11T20:11:44Z,2018-04-11T20:14:43Z,CONTRIBUTOR,"Hi all, any updates on the current status for this? This will be a big help for me as well in particular for processing daily CMIP5 netcdf files. I have been following this thread as well as the original issue and really appreciate this work. One other question: This PR doesn't allow for resampling on non-standard calendars as is, but I remember @shoyer mentioning that a workaround using pandas `Grouper` objects will exist. Would someone be able to explain to me how this would work? Thanks!","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,205473898
https://github.com/pydata/xarray/pull/1252#issuecomment-374091871,https://api.github.com/repos/pydata/xarray/issues/1252,374091871,MDEyOklzc3VlQ29tbWVudDM3NDA5MTg3MQ==,6200806,2018-03-19T03:35:05Z,2018-03-19T03:35:05Z,CONTRIBUTOR,"Just seeing this.  I'm tied up the next couple days but would be happy to review it on Wednesday. Although I doubt I'll find anything you or @shoyer wouldn't, so feel free to merge if you'd rather not hold it up another few days.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,205473898
https://github.com/pydata/xarray/pull/1252#issuecomment-307813862,https://api.github.com/repos/pydata/xarray/issues/1252,307813862,MDEyOklzc3VlQ29tbWVudDMwNzgxMzg2Mg==,6200806,2017-06-12T14:53:26Z,2017-06-12T14:53:26Z,CONTRIBUTOR,"Pinging folks on this.  Summer is upon us and, generally speaking for the academics among us, is a good time for projects like this.

@spencerkclark looks like you're still looking for guidance w/r/t the last batch of comments from May 10.

>From the CI it also looks like I need to accommodate some updates in pandas in NetCDFTimeIndex. I will try and look into that tomorrow.

Did your subsequent commits resolve this?","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,205473898
https://github.com/pydata/xarray/pull/1252#issuecomment-280726382,https://api.github.com/repos/pydata/xarray/issues/1252,280726382,MDEyOklzc3VlQ29tbWVudDI4MDcyNjM4Mg==,6200806,2017-02-17T18:18:48Z,2017-02-17T18:18:48Z,CONTRIBUTOR,"@spencerkclark @shoyer I got some more concrete information c.f. on my previous comment on negative and/or 5 digit dates.  The TRACE simulation outputs netCDF files uses units of thousands of years relative to 1950, and therefore doesn't use 5 integers.  But it does use negative and positive floats...negative for <1950, positive for >1950.

Re: 5 digits, there is growing research interest in very long climate model integrations, e.g. http://www.longrunmip.org/, but even those for now appear <10k yr in duration.

But there are also so called [EMICs](https://www.wcrp-climate.org/modelling-wgcm-mip-catalogue/modelling-wgcm-mips-2/251-modelling-wgcm-catalogue-emics) (Earth Models of Intermediate Complexity) that are cheap to run for 1000s of years.  Although I couldn't immediately find any published results using them for >10k yr duration...

So ultimately I'd say there definitely exists a use-case for negative times (albeit with odd format) and there likely exists a use-case for 5 digit years.  IMHO these are not must-haves for the initial netcdftime implementation but should at least be kept in mind, i.e. code design that makes them not-overly-difficult to introduce eventually.

I suspect there are xarray users with more direct experience with these cases...feel free to chime in","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,205473898