diff --git a/docs/datetime.md b/docs/datetime.md
index 62e85c7..f479b2d 100644
--- a/docs/datetime.md
+++ b/docs/datetime.md
@@ -8,12 +8,12 @@ We are following these priciples:
 
 - The Back-End only ever handles UTC times.
 - When working with schedules we are displaying local time without daylight saving adjustments.
-- Once we create an appointment, we save it using the respective date and time in UTC.
-- Once we display appointments, we convert from UTC to local time incl. daylight saving adjustments.
+- Once we select a slot for an appointment, we save it using the respective date and time in UTC incl. daylight saving adjustments.
+- When we display appointments, we convert from UTC to local time incl. daylight saving adjustments.
 
 ## How it works
 
-> This currently only works for the northern himsphere because we use January as a reference date (see `const jan = new Date`).
+> This currently only works for the northern himsphere because we use January as a reference date (see `const jan = new Date`). We will improve this, when needed.
 
 1. Our Back-End will only every take and return dates using UTC (no daylight saving there)
 1. When managing slots for channels
@@ -21,7 +21,7 @@ We are following these priciples:
    - we will save times without adjusting for daylight saving
 1. When booking appointments
    - we will show time in local time (with or without daylight saving for the respective date)
-   - we will save appointments using UTC (effectivly not touching the time during booking process)
+   - we will save appointments using UTC (converting it to local time and then to utc)
 1. When looking a appointments in the calendar we will show local time (with or without daylight saving).
 1. Client Dashboard converts to localtime (with or without daylight saving).
 1. E-Mails going out about appointments include the timezone of the user, so the proper time can be shown.
diff --git a/src/lib/components/layouts/sidebar-layout/components/notification-item.svelte b/src/lib/components/layouts/sidebar-layout/components/notification-item.svelte
index b8f6242..f629082 100644
--- a/src/lib/components/layouts/sidebar-layout/components/notification-item.svelte
+++ b/src/lib/components/layouts/sidebar-layout/components/notification-item.svelte
@@ -3,7 +3,6 @@
   import { resolve } from "$app/paths";
   import { page } from "$app/state";
   import { m } from "$i18n/messages";
-  import { getLocale } from "$i18n/runtime";
   import { Button } from "$lib/components/ui/button";
   import { Text } from "$lib/components/ui/typography";
   import { ROUTES } from "$lib/const/routes";
@@ -11,7 +10,7 @@
   import { channels as channelsStore } from "$lib/stores/channels";
   import type { TAppointment } from "$lib/types/appointments";
   import type { TNotification } from "$lib/types/notification";
-  import { utcToLocalWithoutDST } from "$lib/utils/datetime";
+  import { toDisplayDateTime } from "$lib/utils/datetime";
   import { getCurrentTranlslation } from "$lib/utils/localizations";
   import { getLocalTimeZone } from "@internationalized/date";
   import { onMount } from "svelte";
@@ -82,15 +81,15 @@
       style="xs"
       class="text-muted-foreground -mb-1 flex pr-8 text-start font-light whitespace-break-spaces"
     >
-      {Intl.DateTimeFormat(getLocale(), {
+      {toDisplayDateTime(new Date(appointment.appointmentDate), {
         year: "numeric",
-        month: "short",
-        day: "numeric",
-        weekday: "short",
+        month: "2-digit",
+        day: "2-digit",
         hour: "2-digit",
         minute: "2-digit",
-        timeZone: getLocalTimeZone().toString(),
-      }).format(utcToLocalWithoutDST(new Date(appointment.appointmentDate)))}
+        timeZone: getLocalTimeZone(),
+        timeZoneName: "short",
+      })}
     </Text>
   {/if}
   <Text style="md" class="flex pr-8 text-start whitespace-break-spaces">
diff --git a/src/lib/components/ui/public/appointment-card.svelte b/src/lib/components/ui/public/appointment-card.svelte
index 8515fbe..bdf1f15 100644
--- a/src/lib/components/ui/public/appointment-card.svelte
+++ b/src/lib/components/ui/public/appointment-card.svelte
@@ -10,6 +10,7 @@
   import { resest } from "../../../../routes/(pages)/(clients)/book-appointment/[[id]]/(components)/utils";
   import { Button } from "../button";
   import LocalizedText from "./localized-text.svelte";
+  import { toDisplayDateTime } from "$lib/utils/datetime";
 
   let {
     class: className,
@@ -75,14 +76,7 @@
               <div class="flex items-start gap-2">
                 <Calendar class="mt-1 size-3 shrink-0" />
                 <Text style="sm" class="font-normal">
-                  {new Intl.DateTimeFormat($publicStore.locale, {
-                    year: "numeric",
-                    month: "long",
-                    day: "numeric",
-                    hour: "2-digit",
-                    minute: "2-digit",
-                    timeZone: "Etc/GMT-1",
-                  }).format(appointment.slot.datetime.toDate("UTC"))}
+                  {toDisplayDateTime(appointment.slot.datetime.toDate("UTC"))}
                 </Text>
               </div>
             {/if}
diff --git a/src/lib/emails/AppointmentBooked.svelte b/src/lib/emails/AppointmentBooked.svelte
index b683f98..93e20fc 100644
--- a/src/lib/emails/AppointmentBooked.svelte
+++ b/src/lib/emails/AppointmentBooked.svelte
@@ -50,7 +50,6 @@
     {appointment.agentName}<br />
     {renderAppointmentDate(appointment.appointmentDate, locale, appointment.timezone)}<br />
     {renderAppointmentTime(appointment.appointmentDate, locale, appointment.timezone)}
-    {m["emails.oclock"]()}
   </EmailText>
   <EmailHeadline>{tenant.longName}</EmailHeadline>
   <EmailText variant="md">
diff --git a/src/lib/emails/AppointmentCancelled.svelte b/src/lib/emails/AppointmentCancelled.svelte
index df8ea47..f5e884f 100644
--- a/src/lib/emails/AppointmentCancelled.svelte
+++ b/src/lib/emails/AppointmentCancelled.svelte
@@ -47,7 +47,6 @@
     {appointment.agentName}<br />
     {renderAppointmentDate(appointment.appointmentDate, locale, appointment.timezone)}<br />
     {renderAppointmentTime(appointment.appointmentDate, locale, appointment.timezone)}
-    {m["emails.oclock"]()}
   </EmailText>
   <EmailHeadline>{tenant.longName}</EmailHeadline>
   <EmailText variant="md">
diff --git a/src/lib/emails/AppointmentRejected.svelte b/src/lib/emails/AppointmentRejected.svelte
index a2b496a..106060e 100644
--- a/src/lib/emails/AppointmentRejected.svelte
+++ b/src/lib/emails/AppointmentRejected.svelte
@@ -47,7 +47,6 @@
     {appointment.agentName}<br />
     {renderAppointmentDate(appointment.appointmentDate, locale, appointment.timezone)}<br />
     {renderAppointmentTime(appointment.appointmentDate, locale, appointment.timezone)}
-    {m["emails.oclock"]()}
   </EmailText>
   <EmailHeadline>{tenant.longName}</EmailHeadline>
   <EmailText variant="md">
diff --git a/src/lib/emails/AppointmentReminder.svelte b/src/lib/emails/AppointmentReminder.svelte
index ca17a30..1db9bb8 100644
--- a/src/lib/emails/AppointmentReminder.svelte
+++ b/src/lib/emails/AppointmentReminder.svelte
@@ -50,7 +50,6 @@
     {appointment.agentName}<br />
     {renderAppointmentDate(appointment.appointmentDate, locale, appointment.timezone)}<br />
     {renderAppointmentTime(appointment.appointmentDate, locale, appointment.timezone)}
-    {m["emails.oclock"]()}
   </EmailText>
   <EmailHeadline>{tenant.longName}</EmailHeadline>
   <EmailText variant="md">
diff --git a/src/lib/emails/AppointmentRequest.svelte b/src/lib/emails/AppointmentRequest.svelte
index 404be16..da948ac 100644
--- a/src/lib/emails/AppointmentRequest.svelte
+++ b/src/lib/emails/AppointmentRequest.svelte
@@ -47,7 +47,6 @@
     {appointment.agentName}<br />
     {renderAppointmentDate(appointment.appointmentDate, locale, appointment.timezone)}<br />
     {renderAppointmentTime(appointment.appointmentDate, locale, appointment.timezone)}
-    {m["emails.oclock"]()}
   </EmailText>
   <EmailHeadline>{tenant.longName}</EmailHeadline>
   <EmailText variant="md">
diff --git a/src/lib/utils/datetime.ts b/src/lib/utils/datetime.ts
index d420cc3..2e04464 100644
--- a/src/lib/utils/datetime.ts
+++ b/src/lib/utils/datetime.ts
@@ -1,16 +1,35 @@
 import { getLocale } from "$i18n/runtime";
 import type { TCalendarSlot } from "$lib/types/calendar";
-import { parseAbsoluteToLocal, toCalendarDateTime } from "@internationalized/date";
+import {
+  getLocalTimeZone,
+  parseAbsoluteToLocal,
+  toCalendarDateTime,
+} from "@internationalized/date";
 
-export const toDisplayDateTime = (date: Date, opts?: Intl.DateTimeFormatOptions) => {
+export const toDisplayDateTime = (
+  date: Date,
+  opts: Intl.DateTimeFormatOptions = {
+    year: "numeric",
+    month: "long",
+    day: "numeric",
+    hour: "2-digit",
+    minute: "2-digit",
+    timeZone: getLocalTimeZone(),
+    timeZoneName: "short",
+  },
+) => {
   const hours = date.getHours();
   const minutes = date.getMinutes();
   const formatter = new Intl.DateTimeFormat(
     getLocale(),
-    opts ?? {
+    opts || {
+      // TODO: Should be moved outside, in cases where needed
       dateStyle: "short",
-      ...(hours !== 0 || minutes !== 0 ? { timeStyle: "short" } : {}),
-      timeZone: "Etc/GMT-1",
+      ...(hours !== 0 || minutes !== 0
+        ? { timeStyle: "short" }
+        : { hour: "2-digit", minute: "2-digit" }),
+      timeZone: getLocalTimeZone(),
+      timeZoneName: "short",
     },
   );
   return formatter.format(date);
@@ -155,3 +174,13 @@ export const localToUTCWithoutDST = (localDate: Date): Date => {
 
   return new Date(localDate.getTime() + standardOffsetMs - currentOffsetMs);
 };
+
+export const localToUTC = (localDate: Date): Date => {
+  const currentOffsetMs = localDate.getTimezoneOffset() * 60 * 1000;
+  return new Date(localDate.getTime() + currentOffsetMs);
+};
+
+export const utcToLocal = (utcDate: Date): Date => {
+  const currentOffsetMs = utcDate.getTimezoneOffset() * 60 * 1000;
+  return new Date(utcDate.getTime() - currentOffsetMs);
+};
diff --git a/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/select-slot.svelte b/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/select-slot.svelte
index 3aeb841..96a4b9d 100644
--- a/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/select-slot.svelte
+++ b/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/select-slot.svelte
@@ -11,6 +11,7 @@
   import type { TPublicAppointment, TPublicSchedule, TPublicSlot } from "$lib/types/public.js";
   import {
     CalendarDate,
+    fromDate,
     getLocalTimeZone,
     parseDate,
     toCalendarDate,
@@ -22,7 +23,11 @@
   import type { DateMatcher } from "bits-ui";
   import type { OnChangeFn } from "vaul-svelte";
   import { fetchSchedule } from "./utils";
-  import { timeUTCToLocalWithoutOffset } from "$lib/utils/datetime";
+  import {
+    localToUTC,
+    timeUTCToLocalWithoutOffset,
+    utcToLocalWithoutDST,
+  } from "$lib/utils/datetime";
 
   const {
     channel,
@@ -137,6 +142,8 @@
 
   const selectSlot = (slot: TPublicSlot) => {
     if (selectedDate && slot.availableAgents.length > 0) {
+      const localTime = utcToLocalWithoutDST(new Date(slot.from));
+      const utc = localToUTC(localTime);
       proceed({
         ...appointment,
         agent: {
@@ -145,10 +152,7 @@
           image: slot.availableAgents[0].image || null,
         },
         slot: {
-          datetime: toCalendarDateTime(selectedDate).set({
-            hour: new Date(slot.from).getUTCHours(),
-            minute: new Date(slot.from).getUTCMinutes(),
-          }),
+          datetime: toCalendarDateTime(fromDate(utc, getLocalTimeZone())),
           duration: slot.duration,
         },
       });
diff --git a/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/summary.svelte b/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/summary.svelte
index 4cd2985..24b2ba4 100644
--- a/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/summary.svelte
+++ b/src/routes/(pages)/(clients)/book-appointment/[[id]]/(components)/summary.svelte
@@ -7,7 +7,6 @@
   import { Text } from "$lib/components/ui/typography";
   import { ROUTES } from "$lib/const/routes";
   import { publicStore } from "$lib/stores/public.js";
-  import { toZoned } from "@internationalized/date";
   import { toast } from "svelte-sonner";
 
   const tenant = $derived($publicStore.tenant);
@@ -30,7 +29,7 @@
       $publicStore.crypto
         .createAppointment(
           appointment.data,
-          toZoned(appointment.slot.datetime, "UTC").toAbsoluteString(),
+          appointment.slot.datetime.toDate("UTC").toISOString(),
           appointment.agent.id,
           channel.id,
           appointment.slot.duration,
diff --git a/src/routes/(pages)/(clients)/clients/(components)/appointment-list.svelte b/src/routes/(pages)/(clients)/clients/(components)/appointment-list.svelte
index 41a7da0..4564a28 100644
--- a/src/routes/(pages)/(clients)/clients/(components)/appointment-list.svelte
+++ b/src/routes/(pages)/(clients)/clients/(components)/appointment-list.svelte
@@ -82,15 +82,7 @@
                 {/if}
               </Item.Title>
               <Item.Description>
-                {toDisplayDateTime(utcToLocalWithoutDST(new Date(item.appointmentDate)), {
-                  year: "numeric",
-                  month: "long",
-                  day: "numeric",
-                  weekday: "short",
-                  hour: "2-digit",
-                  minute: "2-digit",
-                  timeZone: getLocalTimeZone().toString(),
-                })}
+                {toDisplayDateTime(new Date(item.appointmentDate))}
               </Item.Description>
             </Item.Content>
             <Item.Actions>
diff --git a/src/routes/(pages)/dashboard/calendar/(components)/AppointmentDetail.svelte b/src/routes/(pages)/dashboard/calendar/(components)/AppointmentDetail.svelte
index 0cc0c92..71df577 100644
--- a/src/routes/(pages)/dashboard/calendar/(components)/AppointmentDetail.svelte
+++ b/src/routes/(pages)/dashboard/calendar/(components)/AppointmentDetail.svelte
@@ -1,13 +1,12 @@
 <script lang="ts">
+  import { m } from "$i18n/messages";
   import { Button } from "$lib/components/ui/button";
   import { Text } from "$lib/components/ui/typography";
   import { type CurAppointmentItem } from "$lib/stores/calendar";
-  import { getLocalTimeZone } from "@internationalized/date";
+  import { toDisplayDateTime } from "$lib/utils/datetime";
   import { Calendar, Mail, Phone, User } from "@lucide/svelte";
-  import { cancelAppointment, denyAppointment, confirmAppointment } from "./utils";
   import { toast } from "svelte-sonner";
-  import { m } from "$i18n/messages";
-  import { toDisplayDateTime, utcToLocalWithoutDST } from "$lib/utils/datetime";
+  import { cancelAppointment, confirmAppointment, denyAppointment } from "./utils";
 
   let {
     tenantId,
@@ -121,15 +120,7 @@
     <div class="flex gap-2 p-1">
       <Calendar class="size-4 " />
       <Text style="sm">
-        {toDisplayDateTime(utcToLocalWithoutDST(item.appointment.appointment.dateTime), {
-          year: "numeric",
-          month: "long",
-          day: "numeric",
-          weekday: "short",
-          hour: "2-digit",
-          minute: "2-digit",
-          timeZone: getLocalTimeZone().toString(),
-        })}
+        {toDisplayDateTime(item.appointment.appointment.dateTime)}
       </Text>
     </div>
     <div class="mt-5 flex w-full flex-col gap-4">
diff --git a/src/routes/(pages)/dashboard/calendar/(components)/CalendarDay.svelte b/src/routes/(pages)/dashboard/calendar/(components)/CalendarDay.svelte
index bf885e0..7a2b5ec 100644
--- a/src/routes/(pages)/dashboard/calendar/(components)/CalendarDay.svelte
+++ b/src/routes/(pages)/dashboard/calendar/(components)/CalendarDay.svelte
@@ -65,6 +65,8 @@
   >
     <Separator class="bg-secondary absolute top-0 right-0 left-16 h-px w-auto!" />
   </div>
+
+  <!-- Hour markers -->
   {#each shownHours as hour (`hour-${hour}`)}
     <div
       class="relative flex w-full items-start justify-between transition-all duration-200 select-none"
diff --git a/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/AddAppointment.svelte b/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/AddAppointment.svelte
index 696ca62..25b016f 100644
--- a/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/AddAppointment.svelte
+++ b/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/AddAppointment.svelte
@@ -14,6 +14,7 @@
   import SelectAgent from "./SelectAgent.svelte";
   import Summary from "./Summary.svelte";
   import type { TAddAppointment, TAddAppointmentStep } from "./types";
+  import { utcToLocalWithoutDST } from "$lib/utils/datetime";
 
   let {
     tenantId,
@@ -25,10 +26,13 @@
     updateCalendar: () => void;
   } = $props();
 
+  // Set the utc time for it to be properly saved
+  const localTime = utcToLocalWithoutDST(new Date(item.start));
+
   let step: TAddAppointmentStep = $state("email");
   let newAppointment: TAddAppointment = $state({
     locale: getDefaultAppointmentLocale(get(tenants).currentTenant),
-    dateTime: new Date(item.start),
+    dateTime: localTime,
   });
   let isSubmitting = $state(false);
 
diff --git a/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/Summary.svelte b/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/Summary.svelte
index 719a50b..ba1cefe 100644
--- a/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/Summary.svelte
+++ b/src/routes/(pages)/dashboard/calendar/(components)/add-appointment/Summary.svelte
@@ -3,7 +3,7 @@
   import { Separator } from "$lib/components/ui/separator";
   import { Text } from "$lib/components/ui/typography";
   import { agents as agentsStore } from "$lib/stores/agents";
-  import { toDisplayDateTime, utcToLocalWithoutDST } from "$lib/utils/datetime";
+  import { toDisplayDateTime } from "$lib/utils/datetime";
   import { Calendar, Languages, Mail, Phone, User, UserStar } from "@lucide/svelte";
   import type { TAddAppointment, TAddAppointmentStep } from "./types";
   import * as Select from "$lib/components/ui/select";
@@ -28,14 +28,7 @@
   <div class="flex gap-2">
     <Calendar class="size-4 " />
     <Text style="sm">
-      {toDisplayDateTime(utcToLocalWithoutDST(newAppointment.dateTime), {
-        year: "numeric",
-        month: "long",
-        day: "numeric",
-        weekday: "short",
-        hour: "2-digit",
-        minute: "2-digit",
-      })}
+      {toDisplayDateTime(newAppointment.dateTime)}
     </Text>
   </div>
   {#if newAppointment.name}
diff --git a/src/routes/(pages)/dashboard/calendar/(components)/utils.ts b/src/routes/(pages)/dashboard/calendar/(components)/utils.ts
index e8f4cf1..a70e4b1 100644
--- a/src/routes/(pages)/dashboard/calendar/(components)/utils.ts
+++ b/src/routes/(pages)/dashboard/calendar/(components)/utils.ts
@@ -6,6 +6,7 @@ import { auth } from "$lib/stores/auth";
 import { calendarStore } from "$lib/stores/calendar";
 import { staffCrypto } from "$lib/stores/staff-crypto";
 import type { TCalendar, TCalendarItem } from "$lib/types/calendar";
+import { localToUTCWithoutDST } from "$lib/utils/datetime";
 import type { CalendarDate } from "@internationalized/date";
 import { get } from "svelte/store";
 
@@ -60,8 +61,19 @@ function timeToMinutes(dateTimeStr: string): number {
 export function positionItems(items: TCalendarItem[] | undefined) {
   if (!items) return [];
 
+  // Adjust actual appointments
+  const adjustedItems = [...items].map((item) => {
+    if (item.appointment) {
+      return {
+        ...item,
+        start: localToUTCWithoutDST(item.appointment.dateTime).toISOString(),
+      };
+    }
+    return item;
+  });
+
   // Sort items by start time
-  const sortedItems = [...items]
+  const sortedItems = [...adjustedItems]
     .sort((a, b) => b.duration - a.duration)
     .sort((a, b) => timeToMinutes(a.start) - timeToMinutes(b.start));
 
diff --git a/src/routes/(pages)/dashboard/calendar/+page.svelte b/src/routes/(pages)/dashboard/calendar/+page.svelte
index 76a0daa..0b28d6e 100644
--- a/src/routes/(pages)/dashboard/calendar/+page.svelte
+++ b/src/routes/(pages)/dashboard/calendar/+page.svelte
@@ -29,7 +29,7 @@
   import CalendarFilters from "./(components)/CalendarFilters.svelte";
   import CalendarHeader from "./(components)/CalendarHeader.svelte";
   import { fetchCalendar, openAppointmentById } from "./(components)/utils";
-  import { timeUTCToLocalWithoutOffset } from "$lib/utils/datetime";
+  import { timeUTCToLocalWithoutOffset, utcToLocalWithoutDST } from "$lib/utils/datetime";
 
   const convertDate = (dateStr: string) => {
     const zonedDateTime = parseAbsoluteToLocal(dateStr);
@@ -136,7 +136,7 @@
       if (["all", "available"].includes(shownAppointments)) {
         if (shownChannels.length === 0 || shownChannels.includes(channelId)) {
           channelData.availableSlots.forEach((slot) => {
-            if (new Date(slot.to) > new Date()) {
+            if (utcToLocalWithoutDST(new Date(slot.to)) > new Date()) {
               if (
                 shownAgents.length === 0 ||
                 shownAgents.some((id) => slot.availableAgents.map((a) => a.id).includes(id))