HAM!DREZA
32 lines
781 B
JavaScript
32 lines
781 B
JavaScript
function gregorian_to_jalali(gy, gm, gd) {
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var g_d_m, jy, jm, jd, gy2, days;
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g_d_m = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
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gy2 = gm > 2 ? gy + 1 : gy;
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days =
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355666 +
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365 * gy +
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~~((gy2 + 3) / 4) -
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~~((gy2 + 99) / 100) +
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~~((gy2 + 399) / 400) +
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gd +
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g_d_m[gm - 1];
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jy = -1595 + 33 * ~~(days / 12053);
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days %= 12053;
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jy += 4 * ~~(days / 1461);
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days %= 1461;
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if (days > 365) {
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jy += ~~((days - 1) / 365);
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days = (days - 1) % 365;
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}
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if (days < 186) {
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jm = 1 + ~~(days / 31);
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jd = 1 + (days % 31);
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} else {
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jm = 7 + ~~((days - 186) / 30);
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jd = 1 + ((days - 186) % 30);
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}
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return [jy, jm, jd];
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}
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export {gregorian_to_jalali} |