A business day normally means any day except a legal holiday. It may also mean a business day of operation, any of the days an organization operates.[1] It depends on the local workweek which is dictated by local customs, religions, and business operations. It is related to working time, the period of time that an individual spends at paid occupational labor.
Alternatively, a business day may also be defined as any day which the New York Stock Exchange is open for trading or any day except those on which banking institutions are authorized or required by law or other governmental action to close.[2]
ATF was invoked but never defined (see the help page).Business Day means any day other than a Legal Holiday." or "Business Day means any day on which the New York Stock Exchange is open for trading and on which the Fund calculates its net asset value pursuant to the rules of the Securities and Exchange Commission.