The netcdf intermediate files have units like
{code}
int64 time(time) ;
time:long_name = "time" ;
time:units = "days since 2013-06-13 06:00:00" ;
time:calendar = "proleptic_gregorian" ;
{code}
when the start date has a non-zero hour.
The start hour in the units is truncated when CDO converts the file to grib
The netcdf intermediate files have units like {code} int64 time(time) ; time:long_name = "time" ; time:units = "days since 2013-06-13 06:00:00" ; time:calendar = "proleptic_gregorian" ; {code} when the start date has a non-zero hour.
The start hour in the units is truncated when CDO converts the file to grib