sclass DateStructures {
  asclass SomeDate {}

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

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

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

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