scala> import java.util.Date import java.util.Date scala> "%tY%<tm%<td" format new Date res8: String = 20151004 scala> "%tY/%<tm/%<td" format new Date res9: String = 2015/10/04 scala> "%tF" format new Date res10: String = 2015-10-04 scala> import java.util.Calendar import java.util.Calendar scala> Calendar.getInstance().getTime() res11: java.util.Date = Sun Oct 04 15:40:36 JST 2015 scala> "%tY/%<tm/%<td %<tH:%<tM:%<tS" format new Date res12: String = 2015/10/04 15:42:58
Javaのライブラリを使うっぽい。