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diff --git a/node_modules/moment/src/lib/units/year.js b/node_modules/moment/src/lib/units/year.js
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+++ b/node_modules/moment/src/lib/units/year.js
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+import { makeGetSet } from '../moment/get-set';
+import { addFormatToken } from '../format/format';
+import { addUnitAlias } from './aliases';
+import { addUnitPriority } from './priorities';
+import {
+    addRegexToken,
+    match1to2,
+    match1to4,
+    match1to6,
+    match2,
+    match4,
+    match6,
+    matchSigned,
+} from '../parse/regex';
+import { addParseToken } from '../parse/token';
+import { isLeapYear } from '../utils/is-leap-year';
+import { hooks } from '../utils/hooks';
+import { YEAR } from './constants';
+import toInt from '../utils/to-int';
+import zeroFill from '../utils/zero-fill';
+
+// FORMATTING
+
+addFormatToken('Y', 0, 0, function () {
+    var y = this.year();
+    return y <= 9999 ? zeroFill(y, 4) : '+' + y;
+});
+
+addFormatToken(0, ['YY', 2], 0, function () {
+    return this.year() % 100;
+});
+
+addFormatToken(0, ['YYYY', 4], 0, 'year');
+addFormatToken(0, ['YYYYY', 5], 0, 'year');
+addFormatToken(0, ['YYYYYY', 6, true], 0, 'year');
+
+// ALIASES
+
+addUnitAlias('year', 'y');
+
+// PRIORITIES
+
+addUnitPriority('year', 1);
+
+// PARSING
+
+addRegexToken('Y', matchSigned);
+addRegexToken('YY', match1to2, match2);
+addRegexToken('YYYY', match1to4, match4);
+addRegexToken('YYYYY', match1to6, match6);
+addRegexToken('YYYYYY', match1to6, match6);
+
+addParseToken(['YYYYY', 'YYYYYY'], YEAR);
+addParseToken('YYYY', function (input, array) {
+    array[YEAR] =
+        input.length === 2 ? hooks.parseTwoDigitYear(input) : toInt(input);
+});
+addParseToken('YY', function (input, array) {
+    array[YEAR] = hooks.parseTwoDigitYear(input);
+});
+addParseToken('Y', function (input, array) {
+    array[YEAR] = parseInt(input, 10);
+});
+
+// HELPERS
+
+export function daysInYear(year) {
+    return isLeapYear(year) ? 366 : 365;
+}
+
+export { isLeapYear };
+
+// HOOKS
+
+hooks.parseTwoDigitYear = function (input) {
+    return toInt(input) + (toInt(input) > 68 ? 1900 : 2000);
+};
+
+// MOMENTS
+
+export var getSetYear = makeGetSet('FullYear', true);
+
+export function getIsLeapYear() {
+    return isLeapYear(this.year());
+}