diff --git a/src/components/Calendar.vue b/src/components/Calendar.vue
index d184bc6..a948a03 100644
--- a/src/components/Calendar.vue
+++ b/src/components/Calendar.vue
@@ -23,9 +23,9 @@
 
   function selectDay(event : Event, day : number | null){
     if(!(event.target instanceof HTMLElement) || day == null) return;
-    event.target.classList.toggle("item-selected");
     calendar.setDay(day);
     datePicker.select(calendar.getDate());
+    event.target.classList.toggle("item-selected");
   }
 
   function clickPrev(){
diff --git a/src/helpers/ArrayHelper.ts b/src/helpers/ArrayHelper.ts
new file mode 100644
index 0000000..51a34f0
--- /dev/null
+++ b/src/helpers/ArrayHelper.ts
@@ -0,0 +1,24 @@
+export abstract class ArrayHelper {
+
+  public static contains(array : any[], element : any) : boolean {
+    return array.indexOf(element) > -1;
+  }
+
+  public static indexOf(array : any[], element : any) : number {
+    return array.indexOf(element);
+  }
+
+  public static toggleElement(array : any[], element : any) : void {
+
+    let index = ArrayHelper.indexOf(array, element);
+    console.log(index);
+    if(index < 0) {
+      console.log("Not in array")
+      array.push(element);
+    } else {
+      console.log("Already in array")
+      array.splice(index, 1);
+    }
+  }
+
+}
diff --git a/src/stores/CalendarStore.ts b/src/stores/CalendarStore.ts
index 3aadfdc..2b81c85 100644
--- a/src/stores/CalendarStore.ts
+++ b/src/stores/CalendarStore.ts
@@ -1,13 +1,23 @@
 import { defineStore } from 'pinia'
+import { ArrayHelper} from "@/helpers/ArrayHelper.ts";
 
 export const datePickerStore = defineStore('datePicker', {
   state: () => {
-    return { from: new Date(), to: new Date() }
+    return { dates: [] as number[] }
   },
   actions: {
     select(date : Date) {
-      this.from = date < this.from ? date : this.from;
-      this.to =   date > this.to   ? date : this.to;
+      toggleElement(this.dates, date.getTime());
+      console.log(this.dates);
     },
   },
 })
+
+function toggleElement(arr : any[], element:any) : void {
+  let index = ArrayHelper.indexOf(arr, element);
+  if (index < 0) {
+    arr.push(element);
+  } else {
+    arr.splice(index, 1);
+  }
+}