diff --git a/apps/web/src/components/forms/poll-options-form/month-calendar/month-calendar.tsx b/apps/web/src/components/forms/poll-options-form/month-calendar/month-calendar.tsx
index ca200b5c4..511dd8325 100644
--- a/apps/web/src/components/forms/poll-options-form/month-calendar/month-calendar.tsx
+++ b/apps/web/src/components/forms/poll-options-form/month-calendar/month-calendar.tsx
@@ -150,6 +150,7 @@ const MonthCalendar: React.FunctionComponent<DateTimePickerProps> = ({
                             : {
                                 type: "timeSlot",
                                 start: formatDateWithoutTz(selectedDate),
+                                duration,
                                 end: formatDateWithoutTz(
                                   dayjs(selectedDate)
                                     .add(duration, "minutes")
@@ -225,6 +226,7 @@ const MonthCalendar: React.FunctionComponent<DateTimePickerProps> = ({
                         return {
                           type: "timeSlot",
                           start: formatDateWithoutTz(startDate),
+                          duration: duration,
                           end: formatDateWithoutTz(endDate),
                         };
                       }),
@@ -346,6 +348,7 @@ const MonthCalendar: React.FunctionComponent<DateTimePickerProps> = ({
                                 {
                                   type: "timeSlot",
                                   start: startTime,
+                                  duration,
                                   end: formatDateWithoutTz(
                                     dayjs(new Date(startTime))
                                       .add(duration, "minutes")
@@ -382,6 +385,7 @@ const MonthCalendar: React.FunctionComponent<DateTimePickerProps> = ({
                                         startTime: option.start.substring(
                                           option.start.indexOf("T"),
                                         ),
+                                        duration: option.duration,
                                         endTime: option.end.substring(
                                           option.end.indexOf("T"),
                                         ),
@@ -392,10 +396,15 @@ const MonthCalendar: React.FunctionComponent<DateTimePickerProps> = ({
                                   Object.keys(optionsByDay).forEach(
                                     (dateString) => {
                                       times.forEach((time) => {
+                                        const start =
+                                          dateString + time.startTime;
                                         newOptions.push({
                                           type: "timeSlot",
-                                          start: dateString + time.startTime,
-                                          end: dateString + time.endTime,
+                                          start: start,
+                                          duration,
+                                          end: dayjs(start)
+                                            .add(duration, "minutes")
+                                            .format("YYYY-MM-DDTHH:mm"),
                                         });
                                       });
                                     },
diff --git a/apps/web/src/components/forms/poll-options-form/types.ts b/apps/web/src/components/forms/poll-options-form/types.ts
index efcaf6804..510b45bce 100644
--- a/apps/web/src/components/forms/poll-options-form/types.ts
+++ b/apps/web/src/components/forms/poll-options-form/types.ts
@@ -6,6 +6,7 @@ export type DateOption = {
 export type TimeOption = {
   type: "timeSlot";
   start: string;
+  duration: number;
   end: string;
 };
 
diff --git a/apps/web/src/components/forms/poll-options-form/week-calendar.tsx b/apps/web/src/components/forms/poll-options-form/week-calendar.tsx
index b917af0a9..e4a0b1523 100644
--- a/apps/web/src/components/forms/poll-options-form/week-calendar.tsx
+++ b/apps/web/src/components/forms/poll-options-form/week-calendar.tsx
@@ -157,6 +157,7 @@ const WeekCalendar: React.FunctionComponent<DateTimePickerProps> = ({
         const newEvent: DateTimeOption = {
           type: "timeSlot",
           start: formatDateWithoutTz(startDate),
+          duration: dayjs(endDate).diff(endDate, "minutes"),
           end: formatDateWithoutTz(endDate),
         };
 
diff --git a/apps/web/src/pages/poll/[urlId]/edit-options.tsx b/apps/web/src/pages/poll/[urlId]/edit-options.tsx
index 0410b69c8..4412dbaf8 100644
--- a/apps/web/src/pages/poll/[urlId]/edit-options.tsx
+++ b/apps/web/src/pages/poll/[urlId]/edit-options.tsx
@@ -67,6 +67,7 @@ const Page: NextPageWithLayout = () => {
                 ? {
                     type: "timeSlot",
                     start: start.format("YYYY-MM-DDTHH:mm:ss"),
+                    duration: option.duration,
                     end: start
                       .add(option.duration, "minute")
                       .format("YYYY-MM-DDTHH:mm:ss"),
diff --git a/apps/web/src/utils/date-time-utils.ts b/apps/web/src/utils/date-time-utils.ts
index 3410f4128..0c8821030 100644
--- a/apps/web/src/utils/date-time-utils.ts
+++ b/apps/web/src/utils/date-time-utils.ts
@@ -40,8 +40,6 @@ export interface ParsedTimeSlotOption {
 
 export type ParsedDateTimeOpton = ParsedDateOption | ParsedTimeSlotOption;
 
-const isTimeSlot = (value: string) => value.indexOf("/") !== -1;
-
 export const getDuration = (startTime: dayjs.Dayjs, endTime: dayjs.Dayjs) => {
   const hours = Math.floor(endTime.diff(startTime, "hours"));
   const minutes = Math.floor(endTime.diff(startTime, "minute") - hours * 60);
@@ -157,19 +155,3 @@ export const expectTimeOption = (d: DateTimeOption): TimeOption => {
   }
   return d;
 };
-
-export const parseValue = (value: string): DateTimeOption => {
-  if (isTimeSlot(value)) {
-    const [start, end] = value.split("/");
-    return {
-      type: "timeSlot",
-      start,
-      end,
-    };
-  } else {
-    return {
-      type: "date",
-      date: value,
-    };
-  }
-};