diff --git a/handlers/barcodes.go b/handlers/barcodes.go
index d1c966f..18c00ce 100644
--- a/handlers/barcodes.go
+++ b/handlers/barcodes.go
@@ -3,9 +3,9 @@ package handlers
 import (
 	"fmt"
 	"net/http"
-	"strings"
 	"text/template"
 
+	"git.espin.casa/albert/cml04-falcon-ui/helper"
 	"git.espin.casa/albert/cml04-falcon-ui/storage"
 	"git.espin.casa/albert/cml04-falcon-ui/types"
 	"github.com/julienschmidt/httprouter"
@@ -36,6 +36,12 @@ func BarcodesHandler(storage storage.Storager) httprouter.Handle {
 			codigo := r.FormValue("codigo")
 			// date range
 			fechas := r.FormValue("fechas")
+			// get range dates
+			inicio, final, err := helper.Dates(fechas)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
 			// loading bed
 			evacuadores := r.FormValue("evacuadores")
 			// check form values
@@ -49,10 +55,7 @@ func BarcodesHandler(storage storage.Storager) httprouter.Handle {
 				// append barcode to holder
 				Barcodes = append(Barcodes, *data)
 			} else {
-				inicio := strings.Split(fechas, "-")[0]
-				inicio = strings.TrimSpace(inicio)
-				final := strings.Split(fechas, "-")[1]
-				final = strings.TrimSpace(final)
+
 				// get loading bed from string
 				lb, ok := types.MapLoadingBed[evacuadores]
 				// if loading bed not found
@@ -72,8 +75,7 @@ func BarcodesHandler(storage storage.Storager) httprouter.Handle {
 			// parse template files
 			t, _ := template.ParseFiles("templates/base.html", "templates/barcodes.html")
 			// execute templates
-			err := t.Execute(w, Barcodes)
-			if err != nil {
+			if err := t.Execute(w, Barcodes); err != nil {
 				http.Error(w, err.Error(), http.StatusInternalServerError)
 				return
 			}
diff --git a/helper/helper.go b/helper/helper.go
new file mode 100644
index 0000000..6536142
--- /dev/null
+++ b/helper/helper.go
@@ -0,0 +1,26 @@
+package helper
+
+import (
+	"strings"
+	"time"
+)
+
+func Dates(dr string) (start, finish time.Time, err error) {
+	// split string in dates
+	inicio := strings.Split(dr, "-")[0]
+	final := strings.Split(dr, "-")[1]
+	// remove spaces from strings
+	inicio = strings.TrimSpace(inicio)
+	final = strings.TrimSpace(final)
+	// parse start date
+	start, err = time.Parse("02/01/2006 15:04", inicio)
+	if err != nil {
+		return time.Time{}, time.Time{}, err
+	}
+	// parse finish date
+	finish, err = time.Parse("02/01/2006 15:04", final)
+	if err != nil {
+		return time.Time{}, time.Time{}, err
+	}
+	return
+}
diff --git a/storage/storage.go b/storage/storage.go
index cba71af..c40ef26 100644
--- a/storage/storage.go
+++ b/storage/storage.go
@@ -21,9 +21,9 @@ type DBConfig struct {
 
 type Storager interface {
 	Barcode(ctx context.Context, reading string) (barcode *types.Barcode, err error)
-	ListBarcode(ctx context.Context, lb types.LoadingBed, inicio, final string) (barcodes []types.Barcode, err error)
+	ListBarcode(ctx context.Context, lb types.LoadingBed, inicio, final time.Time) (barcodes []types.Barcode, err error)
 	Bundle(ctx context.Context, ua string) (bundle *types.BundleData, err error)
-	ListBundle(ctx context.Context, lb types.LoadingBed, inicio string, final string) (bundles []types.BundleData, err error)
+	ListBundle(ctx context.Context, lb types.LoadingBed, inicio, final time.Time) (bundles []types.BundleData, err error)
 }
 
 type storage struct {
@@ -32,21 +32,13 @@ type storage struct {
 }
 
 // ListBundle implements Storager.
-func (s *storage) ListBundle(ctx context.Context, lb types.LoadingBed, inicio string, final string) (bundles []types.BundleData, err error) {
-	ti, err := time.Parse("02/01/2006 15:04", inicio)
-	if err != nil {
-		return nil, err
-	}
-	tf, err := time.Parse("02/01/2006 15:04", final)
-	if err != nil {
-		return nil, err
-	}
+func (s *storage) ListBundle(ctx context.Context, lb types.LoadingBed, inicio time.Time, final time.Time) (bundles []types.BundleData, err error) {
 	if lb == types.ALL {
-		if err := s.db.Where("created_at >= ? and created_at < ?", ti, tf).Find(bundles).WithContext(ctx).Error; err != nil {
+		if err := s.db.Where("created_at >= ? and created_at < ?", inicio, final).Find(bundles).WithContext(ctx).Error; err != nil {
 			return nil, err
 		}
 	} else {
-		if err := s.db.Where("loading_bed = ? and created_at >= ? and created_at < ?", lb, ti, tf).Find(bundles).WithContext(ctx).Error; err != nil {
+		if err := s.db.Where("loading_bed = ? and created_at >= ? and created_at < ?", lb, inicio, final).Find(bundles).WithContext(ctx).Error; err != nil {
 			return nil, err
 		}
 	}
@@ -62,26 +54,16 @@ func (s *storage) Bundle(ctx context.Context, ua string) (bundle *types.BundleDa
 }
 
 // ListBarcode implements Storager.
-func (s *storage) ListBarcode(ctx context.Context, lb types.LoadingBed, inicio string, final string) (barcodes []types.Barcode, err error) {
-	ti, err := time.Parse("02/01/2006 15:04", inicio)
-	if err != nil {
-		return nil, err
-	}
-	tf, err := time.Parse("02/01/2006 15:04", final)
-	if err != nil {
-		return nil, err
-	}
-
+func (s *storage) ListBarcode(ctx context.Context, lb types.LoadingBed, inicio time.Time, final time.Time) (barcodes []types.Barcode, err error) {
 	if lb == types.ALL {
-		if err := s.db.Where("created_at >= ? and created_at < ?", ti, tf).Find(&barcodes).WithContext(ctx).Error; err != nil {
+		if err := s.db.Where("created_at >= ? and created_at < ?", inicio, final).Find(&barcodes).WithContext(ctx).Error; err != nil {
 			return nil, err
 		}
 	} else {
-		if err := s.db.Where("loading_bed = ? and created_at >= ? and created_at < ?", lb, ti, tf).Find(&barcodes).WithContext(ctx).Error; err != nil {
+		if err := s.db.Where("loading_bed = ? and created_at >= ? and created_at < ?", lb, inicio, final).Find(&barcodes).WithContext(ctx).Error; err != nil {
 			return nil, err
 		}
 	}
-	fmt.Printf("result: +%v\n", barcodes)
 	return
 }