MQL5 ReferenceStandard LibraryPanels and DialogsCDateTimeYearDec MonthNameShortMonthNameDayNameShortDayNameDaysInMonthDateTimeDateTimeSecMinHourDayMonYearSecDecSecIncMinDecMinIncHourDecHourIncDayDecDayIncMonDecMonIncYearDecYearInc YearDec Subtracts specified number of years. void YearDec( int delta=1 // years ) Parameters delta [in] Years to subtract. Return Value None. MonInc YearInc