datetime support not working for cf.Data made from a scalar

I think this should return an integer year, but actually it returns a string (whose contents is incorrect):

>>> cf.Data(-182500.0,units='days since 0001-01-01 00:00:00',calendar='noleap').year               
<CF Data(): -0001-08-20 00:00:00 noleap>

I think it's because it's a scalar.

Maybe this is a bug which has been fixed since I last installed the packages (on jasmin)

>>> cf.environment(paths=False)
Platform: Linux-5.14.0-611.54.1.el9_7.x86_64-x86_64-with-glibc2.34
Python: 3.12.11
packaging: 25.0
numpy: 2.2.6
cfdm.core: 1.12.2.0
udunits2 library: /apps/jasmin/jaspy/miniforge_envs/jaspy3.12/mf3-25.3.0-3/envs/jaspy3.12-mf3-25.3.0-3-v20250704/lib/libudunits2.so.0
HDF5 library: 1.14.3
netcdf library: 4.9.2
netCDF4: 1.7.2
h5netcdf: 1.6.3
h5py: 3.13.0
zarr: 3.0.10
s3fs: 2025.5.1
scipy: 1.15.2
dask: 2025.5.1
cftime: 1.6.4
cfunits: 3.3.7
cfdm: 1.12.2.0
esmpy/ESMF: 8.8.1
psutil: 7.0.0
matplotlib: 3.10.3
cfplot: 3.4.0
cf: 3.18.0

Thanks

Jonathan

Start by reproducing the scalar cf.Data example from the issue and trace how its year property is calculated for the given noleap date. Check the scalar-specific datetime handling and verify that the result is the integer year -1 rather than an incorrect string.