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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
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+'use strict';
+
+var DayWithinYear = require('./DayWithinYear');
+var InLeapYear = require('./InLeapYear');
+
+// https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.4
+
+module.exports = function MonthFromTime(t) {
+ var day = DayWithinYear(t);
+ if (0 <= day && day < 31) {
+ return 0;
+ }
+ var leap = InLeapYear(t);
+ if (31 <= day && day < (59 + leap)) {
+ return 1;
+ }
+ if ((59 + leap) <= day && day < (90 + leap)) {
+ return 2;
+ }
+ if ((90 + leap) <= day && day < (120 + leap)) {
+ return 3;
+ }
+ if ((120 + leap) <= day && day < (151 + leap)) {
+ return 4;
+ }
+ if ((151 + leap) <= day && day < (181 + leap)) {
+ return 5;
+ }
+ if ((181 + leap) <= day && day < (212 + leap)) {
+ return 6;
+ }
+ if ((212 + leap) <= day && day < (243 + leap)) {
+ return 7;
+ }
+ if ((243 + leap) <= day && day < (273 + leap)) {
+ return 8;
+ }
+ if ((273 + leap) <= day && day < (304 + leap)) {
+ return 9;
+ }
+ if ((304 + leap) <= day && day < (334 + leap)) {
+ return 10;
+ }
+ if ((334 + leap) <= day && day < (365 + leap)) {
+ return 11;
+ }
+};