diff --git a/apps/web/server/routers/viewer/slots.tsx b/apps/web/server/routers/viewer/slots.tsx
index de8307cd63..946cabd448 100644
--- a/apps/web/server/routers/viewer/slots.tsx
+++ b/apps/web/server/routers/viewer/slots.tsx
@@ -1,5 +1,7 @@
 import { SchedulingType } from "@prisma/client";
 import dayjs, { Dayjs } from "dayjs";
+import timezone from "dayjs/plugin/timezone";
+import utc from "dayjs/plugin/utc";
 import { z } from "zod";
 
 import type { CurrentSeats } from "@calcom/core/getUserAvailability";
@@ -15,6 +17,9 @@ import getSlots from "@lib/slots";
 import { createRouter } from "@server/createRouter";
 import { TRPCError } from "@trpc/server";
 
+dayjs.extend(utc);
+dayjs.extend(timezone);
+
 const getScheduleSchema = z
   .object({
     // startTime ISOString
diff --git a/packages/prisma/zod-utils.ts b/packages/prisma/zod-utils.ts
index c442260d24..28e15b653d 100644
--- a/packages/prisma/zod-utils.ts
+++ b/packages/prisma/zod-utils.ts
@@ -1,9 +1,14 @@
 import dayjs from "dayjs";
+import timezone from "dayjs/plugin/timezone";
+import utc from "dayjs/plugin/utc";
 import { z } from "zod";
 
 import { LocationType } from "@calcom/core/location";
 import { slugify } from "@calcom/lib/slugify";
 
+dayjs.extend(utc);
+dayjs.extend(timezone);
+
 // Let's not import 118kb just to get an enum
 export enum Frequency {
   YEARLY = 0,