#!/usr/bin/env python
# coding: utf-8

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import xarray as xr
import fsspec


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url='s3://noaa-ofs-pds/dbofs.20200826/nos.dbofs.fields.f044.20200826.t06z.nc'
ncfile = fsspec.open(url)
ds = xr.open_dataset(ncfile.open(), decode_times=False)


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ds.ocean_time.attrs


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ds.ocean_time.attrs['calendar']='proleptic_gregorian'


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ds.ocean_time.attrs


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xr.decode_cf(ds, decode_times=True)


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