diff --git a/frontend/src/components/HelloWorld.vue b/frontend/src/components/HelloWorld.vue
index 1fc7755..2b50266 100644
--- a/frontend/src/components/HelloWorld.vue
+++ b/frontend/src/components/HelloWorld.vue
@@ -1,39 +1,42 @@
 <script setup lang="ts">
-import { ref, onMounted } from 'vue'
-import {Events} from "@wailsio/runtime";
+import { ref, onMounted } from "vue";
+import { Events } from "@wailsio/runtime";
 import * as PostService from "../../bindings/app/internal/services/postservice";
 
-const name = ref('')
-const result = ref('Please enter your name below 👇')
-const time = ref('Listening for Time event...')
+const name = ref("");
+const result = ref("Please enter your name below 👇");
+const time = ref("Listening for Time event...");
 
 const doGreet = () => {
-  let localName = name.value;
-  if (!localName) {
-    localName = 'anonymous';
-  }
-}
+    let localName = name.value;
+    if (!localName) {
+        localName = "anonymous";
+    }
+};
 
 onMounted(async () => {
-  console.log(await PostService.GetById(5))
-  await PostService.ExportToExcel()
-})
-
+    console.log(await PostService.GetById(5));
+});
 </script>
 
 <template>
-  <h1>Kuzbass</h1>
+    <h1>Kuzbass</h1>
 
-  <div class="result"></div>
-  <div class="card">
-    <div class="input-box">
-      <input class="input" v-model="name" type="text" autocomplete="off"/>
-      <button class="btn" @click="doGreet">Greet</button>
+    <div class="result"></div>
+    <div class="card">
+        <div class="input-box">
+            <input
+                class="input"
+                v-model="name"
+                type="text"
+                autocomplete="off"
+            />
+            <button class="btn" @click="doGreet">Greet</button>
+        </div>
     </div>
-  </div>
 
-  <div class="footer">
-    <div><p>Click on the Wails logo to learn more</p></div>
-    <div><p></p></div>
-  </div>
+    <div class="footer">
+        <div><p>Click on the Wails logo to learn more</p></div>
+        <div><p></p></div>
+    </div>
 </template>
diff --git a/internal/extras/excel/export.go b/internal/extras/excel/export.go
index 0cc1f7e..d6f8c49 100644
--- a/internal/extras/excel/export.go
+++ b/internal/extras/excel/export.go
@@ -7,6 +7,8 @@ import (
 	"log/slog"
 	"reflect"
 	"slices"
+	"strings"
+	"time"
 )
 
 type TableHeaders struct {
@@ -56,22 +58,34 @@ func ExportEntityToSpreadsheet[T any](filename, sheetName string, entity T, prov
 	// TODO: appearance
 	for i, item := range items {
 		structValue := reflect.ValueOf(item).Elem()
-		for j := range structValue.NumField() {
+
+		for j := 0; j < structValue.NumField(); j++ {
 			if slices.Contains(headers.IgnoredFieldsIndices, j) {
 				continue
 			}
 			field := structValue.Field(j)
-
 			if isPrimitive(field.Type()) {
-				fieldValue := reflect.ValueOf(field)
-
+				fieldValue := field.Interface()
 				cellName, err := GetCellNameByIndices(j, i+1)
 				if err != nil {
 					return err
 				}
-				fmt.Printf("Field %s value: %v\n", cellName, fieldValue.Interface())
 
-				err = file.SetCellValue(sheetName, cellName, fieldValue.Interface())
+				cellType := structValue.Type().Field(j).Tag.Get(CellTypeTag)
+
+				var cellValue any
+
+				switch cellType {
+				case TimestampTag:
+					cellValue = time.Unix(field.Int(), 0)
+				case DurationTag:
+					cellValue = time.Duration(field.Int())
+				default:
+					cellValue = fieldValue
+				}
+
+				slog.Debug("Field %s value: %v, %s\n", cellName, cellValue, cellType)
+				err = file.SetCellValue(sheetName, cellName, cellValue)
 				if err != nil {
 					return err
 				}
@@ -79,12 +93,7 @@ func ExportEntityToSpreadsheet[T any](filename, sheetName string, entity T, prov
 		}
 	}
 
-	filepath, err := dialogs.SaveFileDialog("Экспорт данных", filename)
-	if err != nil {
-		return err
-	}
-
-	if err := file.SaveAs(filepath); err != nil {
+	if err := WriteData(file, filename); err != nil {
 		return err
 	}
 
@@ -214,6 +223,18 @@ func ApplyStyleHeaders(file *excelize.File, sheetName string, headers TableHeade
 	return nil
 }
 
-func WriteData(file *excelize.File) {
+func WriteData(file *excelize.File, filename string) error {
+	filepath, err := dialogs.SaveFileDialog("Экспорт данных", filename)
 
+	if !strings.HasSuffix(filepath, ".xlsx") {
+		filepath += ".xlsx"
+	}
+
+	if err != nil {
+		return err
+	}
+	if err := file.SaveAs(filepath); err != nil {
+		return err
+	}
+	return nil
 }
diff --git a/internal/extras/excel/tags.go b/internal/extras/excel/tags.go
new file mode 100644
index 0000000..736b219
--- /dev/null
+++ b/internal/extras/excel/tags.go
@@ -0,0 +1,10 @@
+package excel
+
+const (
+	CellTypeTag = "cellType"
+)
+
+const (
+	TimestampTag = "timestamp"
+	DurationTag  = "duration"
+)