sclass DateStructures {
  asclass SomeDate {}
  asclass SomeWeek > SomeDate {}

  // years
  srecord Year(int year) > SomeDate {}
  srecord CurrentYearPlus(int nYears) > SomeDate {}
  
  // months
  srecord Month(int month, Year year) > SomeDate {}
  srecord CurrentMonthPlus(int nMonths) > SomeDate {}
  
  // weeks
  srecord Week(int week, Year year) > SomeWeek {}
  srecord CurrentWeekPlus(int nWeeks) > SomeWeek {}

  // days
  srecord Day(int day, Month month) > SomeDate {}
  srecord TodayPlus(int nDays) > SomeDate {}

  // weekdays
  srecord Weekday(int weekday, SomeWeek week) > SomeDate {} // weekday is in Java count (1=Sunday)

  // hours
  srecord Hour(int hour, Bool isPM, Day day) > SomeDate {}
  srecord CurrentHourPlus(int nHours) > SomeDate {}

  // minutes
  srecord Minute(int minute, Hour hour) > SomeDate {}
  srecord CurrentMinutePlus(int nMinutes) > SomeDate {}
}