code: def adjust_doy_calendar(source, target):
      
      doy_max_source = source.dayofyear.max()
  
      doy_max = infer_doy_max(target)
      if doy_max_source == doy_max:
          return source
  
      return _interpolate_doy_calendar(source, doy_max)
docs: Interpolate from one set of dayofyear range to another calendar.
  
      Interpolate an array defined over a `dayofyear` range (say 1 to 360) to another `dayofyear` range (say 1
      to 365).
  
      Parameters
      ----------
      source : xarray.DataArray
        Array with `dayofyear` coordinates.
      target : xarray.DataArray
        Array with `time` coordinate.
  
      Returns
      -------
      xarray.DataArray
        Interpolated source array over coordinates spanning the target `dayofyear` range.