diff --git a/.eslintrc.json b/.eslintrc.json
index 341903f2..1a9f88f6 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -13,7 +13,8 @@
   },
   "plugins": ["react"],
   "rules": {
-    "react/react-in-jsx-scope": "off"
+    "react/react-in-jsx-scope": "off",
+    "react/prop-types": "off"
   },
   "globals": {
     "React": "writable"
diff --git a/components/PageviewsChart.js b/components/PageviewsChart.js
index 20d5e02c..99fa529b 100644
--- a/components/PageviewsChart.js
+++ b/components/PageviewsChart.js
@@ -15,7 +15,7 @@ export default function PageviewsChart({ data, unit }) {
       switch (unit) {
         case 'day':
           if (n > 7) {
-            return index % (n / 15) === 0 ? format(d, 'MMM d') : '';
+            return index % ~~(n / 15) === 0 ? format(d, 'MMM d') : '';
           }
           return format(d, 'EEE M/d');
         default:
diff --git a/package.json b/package.json
index 06fff41e..7804d7f7 100644
--- a/package.json
+++ b/package.json
@@ -46,6 +46,7 @@
     "cookie": "^0.4.1",
     "cors": "^2.8.5",
     "date-fns": "^2.14.0",
+    "date-fns-tz": "^1.0.10",
     "detect-browser": "^5.1.1",
     "dotenv": "^8.2.0",
     "formik": "^2.1.5",
diff --git a/pages/api/website/[id]/pageviews.js b/pages/api/website/[id]/pageviews.js
index 99e86949..578fbcbf 100644
--- a/pages/api/website/[id]/pageviews.js
+++ b/pages/api/website/[id]/pageviews.js
@@ -11,9 +11,12 @@ export default async (req, res) => {
     return res.status(400).end();
   }
 
+  const start = new Date(+start_at);
+  const end = new Date(+end_at);
+
   const [pageviews, uniques] = await Promise.all([
-    getPageviewData(+id, new Date(+start_at), new Date(+end_at), tz, unit, '*'),
-    getPageviewData(+id, new Date(+start_at), new Date(+end_at), tz, unit, 'distinct session_id'),
+    getPageviewData(+id, start, end, tz, unit, '*'),
+    getPageviewData(+id, start, end, tz, unit, 'distinct session_id'),
   ]);
 
   return res.status(200).json({ pageviews, uniques });
diff --git a/pages/api/website/[id]/summary.js b/pages/api/website/[id]/summary.js
index a1882ad5..c8b95599 100644
--- a/pages/api/website/[id]/summary.js
+++ b/pages/api/website/[id]/summary.js
@@ -1,6 +1,5 @@
 import { getSummary } from 'lib/db';
 import { useAuth } from 'lib/middleware';
-import { format } from 'date-fns';
 
 export default async (req, res) => {
   await useAuth(req, res);
@@ -9,8 +8,8 @@ export default async (req, res) => {
 
   const summary = await getSummary(
     +id,
-    format(new Date(+start_at), 'yyyy-MM-dd hh:mm:ss'),
-    format(new Date(+end_at), 'yyyy-MM-dd hh:mm:ss'),
+    new Date(+start_at).toISOString(),
+    new Date(+end_at).toISOString(),
   );
 
   const stats = Object.keys(summary[0]).reduce((obj, key) => {
diff --git a/yarn.lock b/yarn.lock
index b3419677..f38a23e2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3007,6 +3007,11 @@ d@1, d@^1.0.1:
     es5-ext "^0.10.50"
     type "^1.0.1"
 
+date-fns-tz@^1.0.10:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/date-fns-tz/-/date-fns-tz-1.0.10.tgz#30fef0038f80534fddd8e133a6b8ca55ba313748"
+  integrity sha512-cHQAz0/9uDABaUNDM80Mj1FL4ODlxs1xEY4b0DQuAooO2UdNKvDkNbV8ogLnxLbv02Ru1HXFcot0pVvDRBgptg==
+
 date-fns@^2.14.0:
   version "2.14.0"
   resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-2.14.0.tgz#359a87a265bb34ef2e38f93ecf63ac453f9bc7ba"