diff --git a/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionActivity.tsx b/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionActivity.tsx
index def3f0ba..3b0ad008 100644
--- a/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionActivity.tsx
+++ b/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionActivity.tsx
@@ -7,16 +7,12 @@ import styles from './SessionActivity.module.css';
 export function SessionActivity({
   websiteId,
   sessionId,
-  startDate,
-  endDate,
 }: {
   websiteId: string;
   sessionId: string;
-  startDate: string;
-  endDate: string;
 }) {
   const { formatDate } = useTimezone();
-  const { data, isLoading } = useSessionActivity(websiteId, sessionId, startDate, endDate);
+  const { data, isLoading } = useSessionActivity(websiteId, sessionId);
 
   if (isLoading) {
     return <Loading position="page" />;
diff --git a/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionDetailsPage.tsx b/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionDetailsPage.tsx
index d6a07edc..212f8533 100644
--- a/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionDetailsPage.tsx
+++ b/src/app/(main)/websites/[websiteId]/sessions/[sessionId]/SessionDetailsPage.tsx
@@ -28,12 +28,7 @@ export default function SessionDetailsPage({
         </div>
         <div className={styles.content}>
           <SessionStats data={data} />
-          <SessionActivity
-            websiteId={websiteId}
-            sessionId={sessionId}
-            startDate={data?.firstAt}
-            endDate={data?.lastAt}
-          />
+          <SessionActivity websiteId={websiteId} sessionId={sessionId} />
         </div>
         <div className={styles.data}>
           <SessionData websiteId={websiteId} sessionId={sessionId} />
diff --git a/src/components/hooks/queries/useSessionActivity.ts b/src/components/hooks/queries/useSessionActivity.ts
index 94676a99..e6d7ffa0 100644
--- a/src/components/hooks/queries/useSessionActivity.ts
+++ b/src/components/hooks/queries/useSessionActivity.ts
@@ -1,17 +1,12 @@
 import { useApi } from './useApi';
 
-export function useSessionActivity(
-  websiteId: string,
-  sessionId: string,
-  startDate: string,
-  endDate: string,
-) {
+export function useSessionActivity(websiteId: string, sessionId: string) {
   const { get, useQuery } = useApi();
 
   return useQuery({
     queryKey: ['session:activity', { websiteId, sessionId }],
     queryFn: () => {
-      return get(`/websites/${websiteId}/sessions/${sessionId}/activity`, { startDate, endDate });
+      return get(`/websites/${websiteId}/sessions/${sessionId}/activity`);
     },
   });
 }
diff --git a/src/components/hooks/useFilterParams.ts b/src/components/hooks/useFilterParams.ts
index 343aea9f..525f3492 100644
--- a/src/components/hooks/useFilterParams.ts
+++ b/src/components/hooks/useFilterParams.ts
@@ -1,19 +1,18 @@
 import { useNavigation } from './useNavigation';
 import { useDateRange } from './useDateRange';
 import { useTimezone } from './useTimezone';
-import { zonedTimeToUtc } from 'date-fns-tz';
 
 export function useFilterParams(websiteId: string) {
   const { dateRange } = useDateRange(websiteId);
   const { startDate, endDate, unit } = dateRange;
-  const { timezone } = useTimezone();
+  const { timezone, toUtc } = useTimezone();
   const {
     query: { url, referrer, title, query, host, os, browser, device, country, region, city, event },
   } = useNavigation();
 
   return {
-    startAt: +zonedTimeToUtc(startDate, timezone),
-    endAt: +zonedTimeToUtc(endDate, timezone),
+    startAt: +toUtc(startDate),
+    endAt: +toUtc(endDate),
     unit,
     timezone,
     url,
diff --git a/src/components/hooks/useTimezone.ts b/src/components/hooks/useTimezone.ts
index b5e58ea9..24cef02c 100644
--- a/src/components/hooks/useTimezone.ts
+++ b/src/components/hooks/useTimezone.ts
@@ -1,6 +1,6 @@
 import { setItem } from 'next-basics';
 import { TIMEZONE_CONFIG } from 'lib/constants';
-import { formatInTimeZone } from 'date-fns-tz';
+import { formatInTimeZone, zonedTimeToUtc, utcToZonedTime } from 'date-fns-tz';
 import useStore, { setTimezone } from 'store/app';
 
 const selector = (state: { timezone: string }) => state.timezone;
@@ -23,7 +23,15 @@ export function useTimezone() {
     );
   };
 
-  return { timezone, saveTimezone, formatDate };
+  const toUtc = (date: Date | string | number) => {
+    return zonedTimeToUtc(date, timezone);
+  };
+
+  const fromUtc = (date: Date | string | number) => {
+    return utcToZonedTime(date, timezone);
+  };
+
+  return { timezone, saveTimezone, formatDate, toUtc, fromUtc };
 }
 
 export default useTimezone;
diff --git a/src/lib/clickhouse.ts b/src/lib/clickhouse.ts
index 78f0323e..63027d75 100644
--- a/src/lib/clickhouse.ts
+++ b/src/lib/clickhouse.ts
@@ -8,6 +8,7 @@ import { filtersToArray } from './params';
 import { PageParams, QueryFilters, QueryOptions } from './types';
 
 export const CLICKHOUSE_DATE_FORMATS = {
+  utc: '%Y-%m-%dT%H:%i:%SZ',
   second: '%Y-%m-%d %H:%i:%S',
   minute: '%Y-%m-%d %H:%i:00',
   hour: '%Y-%m-%d %H:00:00',
@@ -47,7 +48,7 @@ function getClient() {
   return client;
 }
 
-function getDateStringSQL(data: any, unit: string | number, timezone?: string) {
+function getDateStringSQL(data: any, unit: string = 'utc', timezone?: string) {
   if (timezone) {
     return `formatDateTime(${data}, '${CLICKHOUSE_DATE_FORMATS[unit]}', '${timezone}')`;
   }
diff --git a/src/pages/api/websites/[websiteId]/sessions/[sessionId]/activity.ts b/src/pages/api/websites/[websiteId]/sessions/[sessionId]/activity.ts
index d1a763fb..8d1b2346 100644
--- a/src/pages/api/websites/[websiteId]/sessions/[sessionId]/activity.ts
+++ b/src/pages/api/websites/[websiteId]/sessions/[sessionId]/activity.ts
@@ -9,16 +9,12 @@ import { getSessionActivity } from 'queries';
 export interface SessionActivityRequestQuery extends PageParams {
   websiteId: string;
   sessionId: string;
-  startDate: string;
-  endDate: string;
 }
 
 const schema = {
   GET: yup.object().shape({
     websiteId: yup.string().uuid().required(),
     sessionId: yup.string().uuid().required(),
-    startDate: yup.string().required(),
-    endDate: yup.string().required(),
   }),
 };
 
@@ -30,19 +26,14 @@ export default async (
   await useAuth(req, res);
   await useValidate(schema, req, res);
 
-  const { websiteId, sessionId, startDate, endDate } = req.query;
+  const { websiteId, sessionId } = req.query;
 
   if (req.method === 'GET') {
     if (!(await canViewWebsite(req.auth, websiteId))) {
       return unauthorized(res);
     }
 
-    const data = await getSessionActivity(
-      websiteId,
-      sessionId,
-      new Date(startDate + 'Z'),
-      new Date(endDate + 'Z'),
-    );
+    const data = await getSessionActivity(websiteId, sessionId);
 
     return ok(res, data);
   }
diff --git a/src/queries/analytics/sessions/getSessionActivity.ts b/src/queries/analytics/sessions/getSessionActivity.ts
index bb7c141c..47c5f590 100644
--- a/src/queries/analytics/sessions/getSessionActivity.ts
+++ b/src/queries/analytics/sessions/getSessionActivity.ts
@@ -2,44 +2,32 @@ import clickhouse from 'lib/clickhouse';
 import { CLICKHOUSE, PRISMA, runQuery } from 'lib/db';
 import prisma from 'lib/prisma';
 
-export async function getSessionActivity(
-  ...args: [websiteId: string, sessionId: string, startDate: Date, endDate: Date]
-) {
+export async function getSessionActivity(...args: [websiteId: string, sessionId: string]) {
   return runQuery({
     [PRISMA]: () => relationalQuery(...args),
     [CLICKHOUSE]: () => clickhouseQuery(...args),
   });
 }
 
-async function relationalQuery(
-  websiteId: string,
-  sessionId: string,
-  startDate: Date,
-  endDate: Date,
-) {
+async function relationalQuery(websiteId: string, sessionId: string) {
   return prisma.client.websiteEvent.findMany({
     where: {
       id: sessionId,
       websiteId,
-      createdAt: { gte: startDate, lte: endDate },
     },
+    take: 500,
   });
 }
 
-async function clickhouseQuery(
-  websiteId: string,
-  sessionId: string,
-  startDate: Date,
-  endDate: Date,
-) {
-  const { rawQuery } = clickhouse;
+async function clickhouseQuery(websiteId: string, sessionId: string) {
+  const { rawQuery, getDateStringSQL } = clickhouse;
 
   return rawQuery(
     `
     select
       session_id as id,
       website_id as websiteId,
-      created_at as createdAt,
+      ${getDateStringSQL('created_at')} as createdAt,
       url_path as urlPath,
       url_query as urlQuery,
       referrer_domain as referrerDomain,
@@ -50,9 +38,9 @@ async function clickhouseQuery(
     from website_event
     where website_id = {websiteId:UUID}
       and session_id = {sessionId:UUID} 
-      and created_at between {startDate:DateTime64} and {endDate:DateTime64}
     order by created_at desc
+    limit 500
     `,
-    { websiteId, sessionId, startDate, endDate },
+    { websiteId, sessionId },
   );
 }
diff --git a/src/queries/analytics/sessions/getWebsiteSession.ts b/src/queries/analytics/sessions/getWebsiteSession.ts
index 22c18642..6f672e7d 100644
--- a/src/queries/analytics/sessions/getWebsiteSession.ts
+++ b/src/queries/analytics/sessions/getWebsiteSession.ts
@@ -19,7 +19,7 @@ async function relationalQuery(websiteId: string, sessionId: string) {
 }
 
 async function clickhouseQuery(websiteId: string, sessionId: string) {
-  const { rawQuery } = clickhouse;
+  const { rawQuery, getDateStringSQL } = clickhouse;
 
   return rawQuery(
     `
@@ -34,8 +34,8 @@ async function clickhouseQuery(websiteId: string, sessionId: string) {
       country,
       subdivision1,
       city,
-      min(min_time) as firstAt,
-      max(max_time) as lastAt,
+      ${getDateStringSQL('min(min_time)')} as firstAt,
+      ${getDateStringSQL('max(max_time)')} as lastAt,
       uniq(visit_id) visits,
       sum(views) as views,
       sum(events) as events,
diff --git a/src/queries/analytics/sessions/getWebsiteSessions.ts b/src/queries/analytics/sessions/getWebsiteSessions.ts
index 60f30b6b..1ea3ef49 100644
--- a/src/queries/analytics/sessions/getWebsiteSessions.ts
+++ b/src/queries/analytics/sessions/getWebsiteSessions.ts
@@ -24,7 +24,7 @@ async function relationalQuery(websiteId: string, filters: QueryFilters, pagePar
 }
 
 async function clickhouseQuery(websiteId: string, filters: QueryFilters, pageParams?: PageParams) {
-  const { pagedQuery, parseFilters } = clickhouse;
+  const { pagedQuery, parseFilters, getDateStringSQL } = clickhouse;
   const { params, dateQuery, filterQuery } = await parseFilters(websiteId, filters);
 
   return pagedQuery(
@@ -42,8 +42,8 @@ async function clickhouseQuery(websiteId: string, filters: QueryFilters, pagePar
       country,
       subdivision1,
       city,
-      min(min_time) as firstAt,
-      max(max_time) as lastAt,
+      ${getDateStringSQL('min(min_time)')} as firstAt,
+      ${getDateStringSQL('max(max_time)')} as lastAt,
       uniq(visit_id) as visits,
       sumIf(views, event_type = 1) as views
     from website_event_stats_hourly