diff --git a/lib/date.js b/lib/date.js
index 6e10f610..13c2e55f 100644
--- a/lib/date.js
+++ b/lib/date.js
@@ -98,14 +98,18 @@ export function getDateArray(data, startDate, endDate, unit) {
 
   function findData(t) {
     const x = data.find(e => {
-      return getLocalTime(new Date(e.t)).getTime() === normalize(new Date(t)).getTime();
+      if (unit === 'day') {
+        const [year, month, day] = e.t.split('-');
+        return normalize(new Date(year, month - 1, day)).getTime() === t.getTime();
+      }
+      return normalize(new Date(e.t)).getTime() === t.getTime();
     });
 
     return x?.y || 0;
   }
 
   for (let i = 0; i < n; i++) {
-    const t = add(startDate, i);
+    const t = normalize(add(startDate, i));
     const y = findData(t);
 
     arr.push({ ...data[i], t, y });
diff --git a/lib/queries.js b/lib/queries.js
index 0b8dde89..4fe46ee2 100644
--- a/lib/queries.js
+++ b/lib/queries.js
@@ -5,7 +5,7 @@ import { subMinutes } from 'date-fns';
 const POSTGRESQL = 'postgresql';
 const MYSQL = 'mysql';
 
-const DATE_FORMATS = {
+const MYSQL_DATE_FORMATS = {
   minute: '%Y-%m-%d %H:%i:00',
   hour: '%Y-%m-%d %H:00:00',
   day: '%Y-%m-%d',
@@ -13,18 +13,38 @@ const DATE_FORMATS = {
   year: '%Y-01-01',
 };
 
+const POSTGRESQL_DATE_FORMATS = {
+  minute: 'YYYY-MM-DD HH24:MI:00',
+  hour: 'YYYY-MM-DD HH24:00:00',
+  day: 'YYYY-MM-DD',
+  month: 'YYYY-MM-01',
+  year: 'YYYY-01-01',
+};
+
 export function getDatabase() {
-  return process.env.DATABASE_TYPE || process.env.DATABASE_URL.split(':')[0];
+  return (
+    process.env.DATABASE_TYPE ||
+    (process.env.DATABASE_URL && process.env.DATABASE_URL.split(':')[0])
+  );
 }
 
-export function getDateQuery(field, unit, timezone) {
-  if (timezone) {
-    const tz = moment.tz(timezone).format('Z');
-
-    return `DATE_FORMAT(convert_tz(${field},'+00:00','${tz}'), '${DATE_FORMATS[unit]}')`;
+export function getDateQuery(db, field, unit, timezone) {
+  if (db === POSTGRESQL) {
+    if (timezone) {
+      return `to_char(date_trunc('${unit}', ${field} at time zone '${timezone}'), '${POSTGRESQL_DATE_FORMATS[unit]}')`;
+    }
+    return `to_char(date_trunc('${unit}', ${field}), '${POSTGRESQL_DATE_FORMATS[unit]}')`;
   }
 
-  return `DATE_FORMAT(${field}, '${DATE_FORMATS[unit]}')`;
+  if (db === MYSQL) {
+    if (timezone) {
+      const tz = moment.tz(timezone).format('Z');
+
+      return `DATE_FORMAT(convert_tz(${field},'+00:00','${tz}'), '${MYSQL_DATE_FORMATS[unit]}')`;
+    }
+
+    return `DATE_FORMAT(${field}, '${MYSQL_DATE_FORMATS[unit]}')`;
+  }
 }
 
 export async function getWebsiteById(website_id) {
@@ -258,7 +278,7 @@ export function getMetrics(website_id, start_at, end_at) {
         sum(t.time) as "totaltime"
       from (
          select session_id,
-           date_trunc('hour', created_at),
+           ${getDateQuery(db, 'created_at', 'hour')},
            count(*) c,
            floor(extract(epoch from max(created_at) - min(created_at))) as "time"
          from pageview
@@ -282,7 +302,7 @@ export function getMetrics(website_id, start_at, end_at) {
         sum(t.time) as "totaltime"
       from (
          select session_id,
-           ${getDateQuery('created_at', 'hour')},
+           ${getDateQuery(db, 'created_at', 'hour')},
            count(*) c,
            floor(unix_timestamp(max(created_at)) - unix_timestamp(min(created_at))) as "time"
          from pageview
@@ -313,7 +333,7 @@ export function getPageviews(
   if (db === POSTGRESQL) {
     return prisma.$queryRaw(
       `
-      select date_trunc('${unit}', created_at at time zone '${timezone}') t,
+      select ${getDateQuery(db, 'created_at', unit, timezone)} t,
         count(${count}) y
       from pageview
       where website_id=$1
@@ -330,7 +350,7 @@ export function getPageviews(
   if (db === MYSQL) {
     return prisma.$queryRaw(
       `
-      select ${getDateQuery('created_at', unit, timezone)} t,
+      select ${getDateQuery(db, 'created_at', unit, timezone)} t,
         count(${count}) y
       from pageview
       where website_id=?
@@ -430,7 +450,7 @@ export function getEvents(website_id, start_at, end_at, timezone = 'utc', unit =
       `
       select
         event_value x,
-        date_trunc('${unit}', created_at at time zone '${timezone}') t,
+        ${getDateQuery(db, 'created_at', unit, timezone)} t,
         count(*) y
       from event
       where website_id=$1
@@ -449,7 +469,7 @@ export function getEvents(website_id, start_at, end_at, timezone = 'utc', unit =
       `
       select
         event_value x,
-        ${getDateQuery('created_at', unit, timezone)} t,
+        ${getDateQuery(db, 'created_at', unit, timezone)} t,
         count(*) y
       from event
       where website_id=?
diff --git a/package.json b/package.json
index 1e3add00..17b79794 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "umami",
-  "version": "0.18.0",
+  "version": "0.19.0",
   "description": "A simple, fast, website analytics alternative to Google Analytics. ",
   "author": "Mike Cao <mike@mikecao.com>",
   "license": "MIT",
diff --git a/scripts/copy-db-schema.js b/scripts/copy-db-schema.js
index 5dda2215..f28c621e 100644
--- a/scripts/copy-db-schema.js
+++ b/scripts/copy-db-schema.js
@@ -2,7 +2,8 @@ require('dotenv').config();
 const fs = require('fs');
 const path = require('path');
 
-const databaseType = process.env.DATABASE_TYPE || process.env.DATABASE_URL.split(':')[0];
+const databaseType =
+  process.env.DATABASE_TYPE || (process.env.DATABASE_URL && process.env.DATABASE_URL.split(':')[0]);
 
 if (!databaseType) {
   throw new Error('Database schema not specified');