1 files changed, 62 insertions, 0 deletions
diff --git a/library/moment/src/lib/units/year.js b/library/moment/src/lib/units/year.js
new file mode 100644
index 000000000..cc32b55b6
--- /dev/null
+++ b/library/moment/src/lib/units/year.js
@@ -0,0 +1,62 @@
+import { makeGetSet } from '../moment/get-set';
+import { addFormatToken } from '../format/format';
+import { addUnitAlias } from './aliases';
+import { addRegexToken, match1to2, match1to4, match1to6, match2, match4, match6, matchSigned } from '../parse/regex';
+import { addParseToken } from '../parse/token';
+import { hooks } from '../utils/hooks';
+import { YEAR } from './constants';
+import toInt from '../utils/to-int';
+
+// FORMATTING
+
+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');
+
+// 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);
+});
+
+// HELPERS
+
+export function daysInYear(year) {
+    return isLeapYear(year) ? 366 : 365;
+}
+
+function isLeapYear(year) {
+    return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
+}
+
+// HOOKS
+
+hooks.parseTwoDigitYear = function (input) {
+    return toInt(input) + (toInt(input) > 68 ? 1900 : 2000);
+};
+
+// MOMENTS
+
+export var getSetYear = makeGetSet('FullYear', false);
+
+export function getIsLeapYear () {
+    return isLeapYear(this.year());
+}