WIP Сделала CalendarHeader, подключила moment js

src/pages/calendar/TheCalendar.vue

@@ -1,10 +1,29 @@
 <template lang="pug">
-  calendar-header
+  calendar-header(
+    :currentDay="currentDate"
+    @previous-date="switchPreviousDate"
+    @next-date="switchNextDate")
 </template>
+
 <script>
+import * as moment from "moment/moment";
 import CalendarHeader from "./components/CalendarHeader.vue";
+moment.locale("ru");
 export default {
   name: "TheCalendar",
   components: { CalendarHeader },
+  data() {
+    return {
+      currentDate: moment(),
+    };
+  },
+  methods: {
+    switchPreviousDate() {
+      this.currentDate = this.currentDate.clone().subtract(1, "day");
+    },
+    switchNextDate() {
+      this.currentDate = this.currentDate.clone().add(1, "day");
+    },
+  },
 };
 </script>