4074         const cdate = Date(1999, 7, 6);  member
4077         assert(date.opCmp(cdate) == 0);
4079         assert(cdate.opCmp(date) == 0);
4080         assert(cdate.opCmp(cdate) == 0);
4081         assert(cdate.opCmp(idate) == 0);
4083         assert(idate.opCmp(cdate) == 0);
4111         const cdate = Date(1999, 7, 6);  member
4113         assert(cdate.year == 1999);
4237         const cdate = Date(0, 7, 6);  member
4241         static assert(!__traits(compiles, cdate.yearBC = 7));
4268         const cdate = Date(1999, 7, 6);  member
4270         assert(cdate.month == 7);
4451         const cdate = Date(1999, 7, 6);  member
4453         static assert(!__traits(compiles, cdate.day = 6));
4616         const cdate = Date(1999, 7, 6);  member
4618         static assert(!__traits(compiles, cdate.add!"years"(7)));
4999         const cdate = Date(1999, 7, 6);  member
5001         static assert(!__traits(compiles, cdate.add!"months"(3)));
5302         const cdate = Date(1999, 7, 6);  member
5304         static assert(!__traits(compiles, cdate.roll!"years"(3)));
5615         const cdate = Date(1999, 7, 6);  member
5617         static assert(!__traits(compiles, cdate.roll!"months"(3)));
6586         const cdate = Date(1999, 7, 6);  member
6589         assert(cdate.diffMonths(date) == 0);
6592         assert(date.diffMonths(cdate) == 0);
6593         assert(cdate.diffMonths(cdate) == 0);
6594         assert(idate.diffMonths(cdate) == 0);
6597         assert(cdate.diffMonths(idate) == 0);
6613         const cdate = Date(1999, 7, 6);  member
6616         static assert(!__traits(compiles, cdate.isLeapYear = true));
6631         const cdate = Date(1999, 7, 6);  member
6633         assert(cdate.dayOfWeek == DayOfWeek.tue);
6634         static assert(!__traits(compiles, cdate.dayOfWeek = DayOfWeek.sun));
6680         const cdate = Date(1999, 7, 6);  member
6682         assert(cdate.dayOfYear == 187);
6751         const cdate = Date(1999, 7, 6);  member
6753         static assert(!__traits(compiles, cdate.dayOfYear = 187));
6837         const cdate = Date(1999, 7, 6);  member
6840         assert(cdate.dayOfGregorianCal == 729_941);
6887         const cdate = Date(1999, 7, 6);  member
6891         static assert(!__traits(compiles, cdate.dayOfGregorianCal = 187));
7006         const cdate = Date(1999, 7, 6);  member
7008         assert(cdate.isoWeek == 27);
7009         static assert(!__traits(compiles, cdate.isoWeek = 3));
7078         const cdate = Date(1999, 7, 6);  member
7080         assert(cdate.isoWeekYear == 1999);
7166         const cdate = Date(1999, 7, 6);  member
7168         static assert(!__traits(compiles, cdate.endOfMonth = Date(1999, 7, 30)));
7222         const cdate = Date(1999, 7, 6);  member
7224         static assert(!__traits(compiles, cdate.daysInMonth = 30));
7254         const cdate = Date(1999, 7, 6);  member
7256         assert(cdate.isAD);
7281         const cdate = Date(1999, 7, 6);  member
7283         assert(cdate.julianDay == 2_451_366);
7303         const cdate = Date(1999, 7, 6);  member
7305         assert(cdate.modJulianDay == 51_365);
7358         const cdate = Date(1999, 7, 6);  member
7360         assert(cdate.toISOString() == "19990706");
7442         const cdate = Date(1999, 7, 6);  member
7444         assert(cdate.toISOExtString() == "1999-07-06");
7526         const cdate = Date(1999, 7, 6);  member
7528         assert(cdate.toSimpleString() == "1999-Jul-06");
7593         const cdate = Date(1999, 7, 6);  member
7596         assert(cdate.toString());
8261         const cdate = Date(1999, 7, 6);
8263         static assert(!__traits(compiles, cdate._addDays(12)));