Standard settlement period for most currencies is 2 business days (Trade Date plus two business days: T+2), with some pairs such as USD.CAD settling the next business day (Trade Date plus one business days: T+1).In order for a date to be a valid settlement date for a Forex transaction, the central banks for both currencies must be open for settlements. If either currency settlement date, has a "holiday" on the target settlement is deferred until the next valid business day for both currencies. Additionally, intervening holidays, that is a holiday between trade date and the standard 2 days later may or may not defer settlement, depending on which currencies are involved. Most currency transactions will not settle on a USD settlement holiday. This treatment is regardless of whether USD is part of the transaction directly, i.e. a EUR.JPY currency transaction will not settle on a USD settlement holiday but will be deferred to the next valid business day for all three currencies.Currency holidays are days in which the there is no settlement of prior transactions.