Seasonal forecast daily and sub daily data on single levels (ECMWF, ERA5)?


Hello everyone!
I have a doubt regarding the forecasted data set. In this data set, the forecast of different lead hours is given with the first day of the month as the initialization day. How to find the lead hour forecasted data of the 2nd day of the month?

Do I have to purchase this or there are some other methods to get the data? Are there any alternate data sets?

Why date 2 to 30 or 31 is deactivate? how get the information of lead hour forecast of different dates of the month?


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