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/4183#issuecomment-1112047474,https://api.github.com/repos/pydata/xarray/issues/4183,1112047474,IC_kwDOAMm_X85CSH9y,6628425,2022-04-28T10:34:20Z,2022-04-28T10:34:20Z,MEMBER,This issue was addressed as part of https://github.com/pydata/xarray/pull/4684.  ,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,646038170
https://github.com/pydata/xarray/issues/4183#issuecomment-1111612658,https://api.github.com/repos/pydata/xarray/issues/4183,1111612658,IC_kwDOAMm_X85CQdzy,26384082,2022-04-28T00:37:43Z,2022-04-28T00:37:43Z,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}",,646038170
https://github.com/pydata/xarray/issues/4183#issuecomment-685200043,https://api.github.com/repos/pydata/xarray/issues/4183,685200043,MDEyOklzc3VlQ29tbWVudDY4NTIwMDA0Mw==,90008,2020-09-02T00:13:30Z,2020-09-02T00:13:30Z,CONTRIBUTOR,"i ran into this problem trying to round trip time to the nanosecond (even though i don't need it, sub micro second would be nice)

but unfrotunately, you run into the fact that cftime doesn't support nanoseconds
https://github.com/Unidata/cftime/blob/master/cftime/_cftime.pyx

Seems like they discussed a nanosecond issue a while back too
https://github.com/Unidata/cftime/issues/77

Their ultimate point was that there was little point in having precision down to the nano second given that python datetime objects only have microseconds. I guess they are right.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,646038170
https://github.com/pydata/xarray/issues/4183#issuecomment-651851046,https://api.github.com/repos/pydata/xarray/issues/4183,651851046,MDEyOklzc3VlQ29tbWVudDY1MTg1MTA0Ng==,3460034,2020-06-30T15:01:27Z,2020-06-30T15:01:27Z,CONTRIBUTOR,"> We would absolutely accept a pull request for this, but I'm not 100% sure that nanoseconds are valid per CF conventions. CF conventions references udunits.dat, which as far as I can tell includes no units smaller than 1 second:
> https://www.unidata.ucar.edu/software/udunits/udunits-1/udunits.txt

Nanoseconds (and seconds with any other SI prefix from yocto to yotta) are indeed valid in the CF conventions. For reference, there is [this table](http://cfconventions.org/Data/cf-conventions/cf-conventions-1.8/cf-conventions.html#table-supported-units) in v1.8 of the conventions, as well as the [SI prefix](https://www.unidata.ucar.edu/software/udunits/udunits-current/udunits/udunits2-prefixes.xml) and [SI base unit](https://www.unidata.ucar.edu/software/udunits/udunits-current/udunits/udunits2-base.xml) databases of UDUNITS.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,646038170
https://github.com/pydata/xarray/issues/4183#issuecomment-651404825,https://api.github.com/repos/pydata/xarray/issues/4183,651404825,MDEyOklzc3VlQ29tbWVudDY1MTQwNDgyNQ==,1217238,2020-06-29T22:34:35Z,2020-06-29T22:34:35Z,MEMBER,"We would absolutely accept a pull request for this, but I'm not 100% sure that nanoseconds are valid per CF conventions. CF conventions references udunits.dat, which as far as I can tell includes no units smaller than 1 second:
https://www.unidata.ucar.edu/software/udunits/udunits-1/udunits.txt","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,646038170
https://github.com/pydata/xarray/issues/4183#issuecomment-651370968,https://api.github.com/repos/pydata/xarray/issues/4183,651370968,MDEyOklzc3VlQ29tbWVudDY1MTM3MDk2OA==,2448579,2020-06-29T21:15:17Z,2020-06-29T21:15:17Z,MEMBER,"Thanks @fbriol . 

We would happily take a PR for this.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,646038170