diff --git a/blog/context_processors.py b/blog/context_processors.py
index 3b2862d..512e4f4 100644
--- a/blog/context_processors.py
+++ b/blog/context_processors.py
@@ -1,5 +1,6 @@
 import logging
-from datetime import datetime
+
+from django.utils import timezone
 
 from djangoblog.utils import cache, get_blog_setting
 from .models import Category, Article
@@ -33,6 +34,6 @@ def seo_processor(requests):
             'ANALYTICS_CODE': setting.analyticscode,
             "BEIAN_CODE_GONGAN": setting.gongan_beiancode,
             "SHOW_GONGAN_CODE": setting.show_gongan_code,
-            "CURRENT_YEAR": datetime.now().year}
+            "CURRENT_YEAR": timezone.now().year}
         cache.set(key, value, 60 * 60 * 10)
         return value
diff --git a/blog/views.py b/blog/views.py
index 0e6f962..14174ef 100644
--- a/blog/views.py
+++ b/blog/views.py
@@ -1,4 +1,3 @@
-import datetime
 import logging
 import os
 import uuid
@@ -8,6 +7,7 @@ from django.core.paginator import Paginator
 from django.http import HttpResponse, HttpResponseForbidden
 from django.shortcuts import get_object_or_404
 from django.shortcuts import render
+from django.utils import timezone
 from django.views.decorators.csrf import csrf_exempt
 from django.views.generic.detail import DetailView
 from django.views.generic.list import ListView
@@ -309,7 +309,7 @@ def fileupload(request):
             return HttpResponseForbidden()
         response = []
         for filename in request.FILES:
-            timestr = datetime.datetime.now().strftime('%Y/%m/%d')
+            timestr = timezone.now().strftime('%Y/%m/%d')
             imgextensions = ['jpg', 'png', 'jpeg', 'bmp']
             fname = u''.join(str(filename))
             isimage = len([i for i in imgextensions if fname.find(i) >= 0]) > 0
diff --git a/comments/models.py b/comments/models.py
index 67df624..d7f5faa 100644
--- a/comments/models.py
+++ b/comments/models.py
@@ -29,7 +29,7 @@ class Comment(models.Model):
         '是否显示', default=True, blank=False, null=False)
 
     class Meta:
-        ordering = ['id']
+        ordering = ['-id']
         verbose_name = "评论"
         verbose_name_plural = verbose_name
         get_latest_by = 'id'
diff --git a/djangoblog/feeds.py b/djangoblog/feeds.py
index 1c09246..8c4e851 100644
--- a/djangoblog/feeds.py
+++ b/djangoblog/feeds.py
@@ -1,11 +1,10 @@
-from datetime import datetime
-
 from django.contrib.auth import get_user_model
 from django.contrib.syndication.views import Feed
+from django.utils import timezone
 from django.utils.feedgenerator import Rss201rev2Feed
 
-from djangoblog.utils import CommonMarkdown
 from blog.models import Article
+from djangoblog.utils import CommonMarkdown
 
 
 class DjangoBlogFeed(Feed):
@@ -31,7 +30,7 @@ class DjangoBlogFeed(Feed):
         return CommonMarkdown.get_markdown(item.body)
 
     def feed_copyright(self):
-        now = datetime.now()
+        now = timezone.now()
         return "Copyright© {year} 且听风吟".format(year=now.year)
 
     def item_link(self, item):
diff --git a/oauth/views.py b/oauth/views.py
index fdfb542..a15311d 100644
--- a/oauth/views.py
+++ b/oauth/views.py
@@ -1,4 +1,3 @@
-import datetime
 import logging
 # Create your views here.
 from urllib.parse import urlparse
@@ -13,6 +12,7 @@ from django.http import HttpResponseRedirect
 from django.shortcuts import get_object_or_404
 from django.shortcuts import render
 from django.urls import reverse
+from django.utils import timezone
 from django.views.generic import FormView
 
 from djangoblog.blog_signals import oauth_user_login_signal
@@ -73,8 +73,7 @@ def authorize(request):
     user = manager.get_oauth_userinfo()
     if user:
         if not user.nikename or not user.nikename.strip():
-            import datetime
-            user.nikename = "djangoblog" + datetime.datetime.now().strftime('%y%m%d%I%M%S')
+            user.nikename = "djangoblog" + timezone.now().strftime('%y%m%d%I%M%S')
         try:
             temp = OAuthUser.objects.get(type=type, openid=user.openid)
             temp.picture = user.picture
@@ -102,7 +101,7 @@ def authorize(request):
                         except ObjectDoesNotExist:
                             author.username = user.nikename
                         else:
-                            author.username = "djangoblog" + datetime.datetime.now().strftime('%y%m%d%I%M%S')
+                            author.username = "djangoblog" + timezone.now().strftime('%y%m%d%I%M%S')
                         author.source = 'authorize'
                         author.save()
 
@@ -141,7 +140,7 @@ def emailconfirm(request, id, sign):
             if result[1]:
                 author.source = 'emailconfirm'
                 author.username = oauthuser.nikename.strip() if oauthuser.nikename.strip(
-                ) else "djangoblog" + datetime.datetime.now().strftime('%y%m%d%I%M%S')
+                ) else "djangoblog" + timezone.now().strftime('%y%m%d%I%M%S')
                 author.save()
         oauthuser.author = author
         oauthuser.save()
diff --git a/owntracks/views.py b/owntracks/views.py
index 65bfd3e..1396b95 100644
--- a/owntracks/views.py
+++ b/owntracks/views.py
@@ -10,6 +10,7 @@ from django.contrib.auth.decorators import login_required
 from django.http import HttpResponse
 from django.http import JsonResponse
 from django.shortcuts import render
+from django.utils import timezone
 from django.views.decorators.csrf import csrf_exempt
 
 from .models import OwnTrackLog
@@ -45,7 +46,7 @@ def manage_owntrack_log(request):
 @login_required
 def show_maps(request):
     if request.user.is_superuser:
-        defaultdate = str(datetime.datetime.now().date())
+        defaultdate = str(timezone.now().date())
         date = request.GET.get('date', defaultdate)
         context = {
             'date': date