In Japan, although only New Year's Day, January 1st, is a national holiday, at least the period of sanganichi (the three days) through January 3rd (sometimes including several days following it) is substantially a holiday period, and is actually called 'o-shogatsu' (a polite form of shogatsu).
日本では、1月1日の元日のみを国民の祝日としているが、実際には少なくとも1月3日までの三箇日（場合によってはそれ以後の数日間も）を「お正月」と呼んで、事実上の祝日と同じ状態となる。