diff --git a/app/Helpers/date_time.php b/app/Helpers/date_time.php
index 5c0afce..8cf0b02 100644
--- a/app/Helpers/date_time.php
+++ b/app/Helpers/date_time.php
@@ -34,21 +34,21 @@ function date_id($date)
     throw new App\Exceptions\InvalidDateException('Invalid date format.');
 }
 
-function monthNumber($number)
+function month_number($number)
 {
     return str_pad($number, 2, '0', STR_PAD_LEFT);
 }
 
-function monthId($monthNumber)
+function monthId($month_number)
 {
-    if (is_null($monthNumber)) {
-        return $monthNumber;
+    if (is_null($month_number)) {
+        return $month_number;
     }
 
     $months = get_months();
-    $monthNumber = monthNumber($monthNumber);
+    $month_number = month_number($month_number);
 
-    return $months[$monthNumber];
+    return $months[$month_number];
 }
 
 function get_months()
diff --git a/resources/views/reports/sales/daily.blade.php b/resources/views/reports/sales/daily.blade.php
index 88da42c..1f1f335 100755
--- a/resources/views/reports/sales/daily.blade.php
+++ b/resources/views/reports/sales/daily.blade.php
@@ -14,7 +14,7 @@
 {{ link_to_route(
     'reports.sales.monthly',
     __('report.view_monthly'),
-    ['month' => monthNumber($dt->month), 'year' => $dt->year],
+    ['month' => month_number($dt->month), 'year' => $dt->year],
     ['class' => 'btn btn-default btn-sm']
 ) }}
 {{ Form::close() }}
diff --git a/resources/views/reports/sales/yearly.blade.php b/resources/views/reports/sales/yearly.blade.php
index aaa0d16..40eaba7 100755
--- a/resources/views/reports/sales/yearly.blade.php
+++ b/resources/views/reports/sales/yearly.blade.php
@@ -32,30 +32,30 @@
             </thead>
             <tbody>
                 @php $chartData = []; @endphp
-                @foreach(get_months() as $monthNumber => $monthName)
+                @foreach(get_months() as $month_number => $monthName)
                 @php
-                    $any = isset($reports[$monthNumber]);
-                    $omzet = $any ? $reports[$monthNumber]->omzet : 0
+                    $any = isset($reports[$month_number]);
+                    $omzet = $any ? $reports[$month_number]->omzet : 0
                 @endphp
                 <tr>
-                    <td class="text-center">{{ monthId($monthNumber) }}</td>
-                    <td class="text-center">{{ $any ? $reports[$monthNumber]->count : 0 }}</td>
+                    <td class="text-center">{{ monthId($month_number) }}</td>
+                    <td class="text-center">{{ $any ? $reports[$month_number]->count : 0 }}</td>
                     <td class="text-right">{{ format_rp($omzet) }}</td>
                     <td class="text-center">
                         {{ link_to_route(
                             'reports.sales.monthly',
                             __('report.view_monthly'),
-                            ['month' => $monthNumber, 'year' => $year],
+                            ['month' => $month_number, 'year' => $year],
                             [
                                 'class' => 'btn btn-info btn-xs',
-                                'title' => __('report.monthly', ['year_month' => monthId($monthNumber)]),
-                                'title' => __('report.monthly', ['year_month' => monthId($monthNumber).' '.$year]),
+                                'title' => __('report.monthly', ['year_month' => monthId($month_number)]),
+                                'title' => __('report.monthly', ['year_month' => monthId($month_number).' '.$year]),
                             ]
                         ) }}
                     </td>
                 </tr>
                 @php
-                    $chartData[] = ['month' => monthId($monthNumber), 'value' => $omzet];
+                    $chartData[] = ['month' => monthId($month_number), 'value' => $omzet];
                 @endphp
                 @endforeach
             </tbody>