IF function on date with multiple criteria

Hi friends,

It looks quite simple and it works when I apply the "IF" function on the "Date" column to perform an operand on column 'kWh' as shown below. However, I have no success when I add multiple criteria to 'Date' for example I want to do this multiplication only for 3 days and my code is as below but the 'New column' comes with "Error"

if [date]=#date(2021,05,02) or [date]=#date(2021,05,03) then [kWh]*1000 else [kWh]

any idea please!