Why can I only select 1 day of Seasonal Forecast data from the CDS?

While downloading data from ECMWF originating center, we can select only day 1. I need forecast for all days in hindcast period. Day shows start date day.

Some of the modelling centres (including ECMWF) only run their models on day 1 of each month, but the output data cover all days out to ~7 months (e.g. 1/1/1993 hindcast will have data for all days out to July 1993, 1/2/1993 hindcast will have all data out to August 1993, etc).

Please check the dataset documentation for details:

Documentation for C3S seasonal datasets in the CDS