public static LunarDate SolarToLunar(DateTime date, int timeZone)
{
long k, dayNumber, monthStart, a11, b11, lunarDay, lunarMonth, lunarYear, diff, leapMonthDiff;
bool lunarLeap;
dayNumber = LunarYearTools.jdFromDate(date.Day, date.Month, date.Year);
k = LunarYearTools.INT((dayNumber - 2415021.076998695) / 29.530588853);
monthStart = LunarYearTools.getNewMoonDay(k + 1, timeZone);
if (monthStart > dayNumber)
{
monthStart = LunarYearTools.getNewMoonDay(k, timeZone);
}
// alert(dayNumber+" -> "+monthStart);
a11 = LunarYearTools.getLunarMonth11(date.Year, timeZone);
b11 = a11;
if (a11 >= monthStart)
{
lunarYear = date.Year;
a11 = LunarYearTools.getLunarMonth11(date.Year - 1, timeZone);
}
else
{
lunarYear = date.Year + 1;
b11 = LunarYearTools.getLunarMonth11(date.Year + 1, timeZone);
}
lunarDay = dayNumber - monthStart + 1;
diff = LunarYearTools.INT((monthStart - a11) / 29);
lunarLeap = false;
lunarMonth = diff + 11;
if (b11 - a11 > 365)
{
leapMonthDiff = LunarYearTools.getLeapMonthOffset(a11, timeZone);
if (diff >= leapMonthDiff)
{
lunarMonth = diff + 10;
if (diff == leapMonthDiff)
{
lunarLeap = true;
}
}
}
if (lunarMonth > 12)
{
lunarMonth = lunarMonth - 12;
}
if (lunarMonth >= 11 && diff < 4)
{
lunarYear -= 1;
}
return(new LunarDate((int)lunarDay, (int)lunarMonth, (int)lunarYear, lunarLeap));
}
