先月last month先週last week先生teacher先輩senior先日the other day先々月month before last先々週week before last先祖ancestor先端pointed end先頭head祖先ancestor先行preceding先先月month before last先先月month before last先先週week before last先先週week before last先代family predecessor先だってrecently先着first arrival先天的a priori優先preference
日 じつ
先日the other day一昨日day before yesterday祭日national holiday祝日national holiday当日appointed day平日weekday一日one day期日fixed date終日all day連日every day