Adding a flag for a timezone to download reanalysis data

Hello. I would like to download hourly data from the ERA5 Reanalysis dataset. I would like to download data where the timezone is set to UTC -8. Below is the code I attempted. It does not work. Am I misspelling a keyword or something?

Many thanks!

c.retrieve(
            'reanalysis-era5-single-levels',
            {
                'product_type': 'reanalysis',
                'variable': 'surface_solar_radiation_downwards',
                'year': '2015',
                'month': ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12',],
                'day': [
                    '01', '02', '03',
                    '04', '05', '06',
                    '07', '08', '09',
                    '10', '11', '12',
                    '13', '14', '15',
                    '16', '17', '18',
                    '19', '20', '21',
                    '22', '23', '24',
                    '25', '26', '27',
                    '28', '29', '30',
                    '31',
                    ],
                'time': [
                    '00:00', '01:00', '02:00',
                    '03:00', '04:00', '05:00',
                    '06:00', '07:00', '08:00',
                    '09:00', '10:00', '11:00',
                    '12:00', '13:00', '14:00',
                    '15:00', '16:00', '17:00',
                    '18:00', '19:00', '20:00',
                    '21:00', '22:00', '23:00',
                    ],
                'time_zone': 'UTC-8',
                'area': station_point_coord,
                'format': 'netcdf',
                },
            f'download_Location_1.nc')