Does anyone know if there's an exchange in the U.S that observes a statutory holiday on a different date than other exchanges, regardless of financial instruments traded? For example, Christmas Day will be observed on Dec 26 this year. Do you know of any U.S. exchange that observes it on a date other than Dec 26? While we're at it, do all exchanges in a given country, again regardless of financial instruments traded, observe a statutory holiday on the same date? I'm asking because we're developing trading software and there's a debate over wether an observed holiday depends on an exchange. Thanks in advance.