Not necessarily. The first day used for business would generally be asked when you are starting to use an asset for business purposes that you have previously used only for personal purposes. This could be something like your vehicle or a computer.
If you purchased a new asset specifically to be used in your business, then the first day used would probably be the same as the day it was purchased.
Or, if you just started your business during the year, the first day used for business could be the same day as the day you started your business.