This adds moment to perfect date/time sorting with tabulator!

js/moment/src/lib/units/day-of-month.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, match2 } from '../parse/regex';
+import { addParseToken } from '../parse/token';
+import { DATE } from './constants';
+import toInt from '../utils/to-int';
+
+// FORMATTING
+
+addFormatToken('D', ['DD', 2], 'Do', 'date');
+
+// ALIASES
+
+addUnitAlias('date', 'D');
+
+// PRIOROITY
+addUnitPriority('date', 9);
+
+// PARSING
+
+addRegexToken('D',  match1to2);
+addRegexToken('DD', match1to2, match2);
+addRegexToken('Do', function (isStrict, locale) {
+    // TODO: Remove "ordinalParse" fallback in next major release.
+    return isStrict ?
+      (locale._dayOfMonthOrdinalParse || locale._ordinalParse) :
+      locale._dayOfMonthOrdinalParseLenient;
+});
+
+addParseToken(['D', 'DD'], DATE);
+addParseToken('Do', function (input, array) {
+    array[DATE] = toInt(input.match(match1to2)[0], 10);
+});
+
+// MOMENTS
+
+export var getSetDayOfMonth = makeGetSet('Date', true);