diff --git a/packages/features/bookings/lib/handleNewBooking.ts b/packages/features/bookings/lib/handleNewBooking.ts
index 3f37f65306..80d477957f 100644
--- a/packages/features/bookings/lib/handleNewBooking.ts
+++ b/packages/features/bookings/lib/handleNewBooking.ts
@@ -21,7 +21,7 @@ import { cancelScheduledJobs, scheduleTrigger } from "@calcom/app-store/zapier/l
 import EventManager from "@calcom/core/EventManager";
 import { getEventName } from "@calcom/core/event";
 import { getUserAvailability } from "@calcom/core/getUserAvailability";
-import dayjs from "@calcom/dayjs";
+import dayjs, { ConfigType } from "@calcom/dayjs";
 import {
   sendAttendeeRequestEmail,
   sendOrganizerRequestEmail,
@@ -46,6 +46,7 @@ import { EventTypeMetaDataSchema, extendedBookingCreateBody } from "@calcom/pris
 import type { BufferedBusyTime } from "@calcom/types/BufferedBusyTime";
 import type { AdditionalInformation, AppsStatus, CalendarEvent } from "@calcom/types/Calendar";
 import type { EventResult, PartialReference } from "@calcom/types/EventManager";
+import { WorkingHours } from "@calcom/types/schedule";
 
 import sendPayload, { EventTypeInfo } from "../../webhooks/lib/sendPayload";
 
@@ -83,40 +84,56 @@ async function refreshCredentials(credentials: Array<Credential>): Promise<Array
   return await async.mapLimit(credentials, 5, refreshCredential);
 }
 
-function isAvailable(busyTimes: BufferedBusyTimes, time: dayjs.ConfigType, length: number): boolean {
-  // Check for conflicts
-  let t = true;
-
-  // Early return
-  if (!Array.isArray(busyTimes) || busyTimes.length < 1) return t;
-
-  let i = 0;
-  while (t === true && i < busyTimes.length) {
-    const busyTime = busyTimes[i];
-    i++;
-    const startTime = dayjs(busyTime.start);
-    const endTime = dayjs(busyTime.end);
-
-    // Check if time is between start and end times
-    if (dayjs(time).isBetween(startTime, endTime, null, "[)")) {
-      t = false;
-      break;
-    }
-
-    // Check if slot end time is between start and end time
-    if (dayjs(time).add(length, "minutes").isBetween(startTime, endTime)) {
-      t = false;
-      break;
-    }
-
-    // Check if startTime is between slot
-    if (startTime.isBetween(dayjs(time), dayjs(time).add(length, "minutes"))) {
-      t = false;
-      break;
+const isWithinAvailableHours = (
+  timeSlot: { start: ConfigType; end: ConfigType },
+  {
+    workingHours,
+  }: {
+    workingHours: WorkingHours[];
+  }
+) => {
+  const timeSlotStart = dayjs(timeSlot.start).utc();
+  const timeSlotEnd = dayjs(timeSlot.end).utc();
+  for (const workingHour of workingHours) {
+    // TODO: Double check & possibly fix timezone conversions.
+    const startTime = timeSlotStart.startOf("day").add(workingHour.startTime, "minute");
+    const endTime = timeSlotEnd.startOf("day").add(workingHour.endTime, "minute");
+    if (
+      workingHour.days.includes(timeSlotStart.day()) &&
+      // UTC mode, should be performant.
+      timeSlotStart.isBetween(startTime, endTime, null, "[)") &&
+      timeSlotEnd.isBetween(startTime, endTime, null, "(]")
+    ) {
+      return true;
     }
   }
+  return false;
+};
 
-  return t;
+// if true, there are conflicts.
+function checkForConflicts(busyTimes: BufferedBusyTimes, time: dayjs.ConfigType, length: number) {
+  // Early return
+  if (!Array.isArray(busyTimes) || busyTimes.length < 1) {
+    return false; // guaranteed no conflicts when there is no busy times.
+  }
+
+  for (const busyTime of busyTimes) {
+    const startTime = dayjs(busyTime.start);
+    const endTime = dayjs(busyTime.end);
+    // Check if time is between start and end times
+    if (dayjs(time).isBetween(startTime, endTime, null, "[)")) {
+      return true;
+    }
+    // Check if slot end time is between start and end time
+    if (dayjs(time).add(length, "minutes").isBetween(startTime, endTime)) {
+      return true;
+    }
+    // Check if startTime is between slot
+    if (startTime.isBetween(dayjs(time), dayjs(time).add(length, "minutes"))) {
+      return true;
+    }
+  }
+  return false;
 }
 
 const getEventTypesFromDB = async (eventTypeId: number) => {
@@ -199,7 +216,7 @@ async function ensureAvailableUsers(
   const availableUsers: typeof eventType.users = [];
   /** Let's start checking for availability */
   for (const user of eventType.users) {
-    const { busy: bufferedBusyTimes } = await getUserAvailability(
+    const { busy: bufferedBusyTimes, workingHours } = await getUserAvailability(
       {
         userId: user.id,
         eventTypeId: eventType.id,
@@ -208,9 +225,22 @@ async function ensureAvailableUsers(
       { user, eventType }
     );
 
+    // check if time slot is outside of schedule.
+    if (
+      !isWithinAvailableHours(
+        { start: input.dateFrom, end: input.dateTo },
+        {
+          workingHours,
+        }
+      )
+    ) {
+      // user does not have availability at this time, skip user.
+      continue;
+    }
+
     console.log("calendarBusyTimes==>>>", bufferedBusyTimes);
 
-    let isAvailableToBeBooked = true;
+    let foundConflict = true;
     try {
       if (eventType.recurringEvent) {
         const recurringEvent = parseRecurringEvent(eventType.recurringEvent);
@@ -219,23 +249,19 @@ async function ensureAvailableUsers(
         // DONE: Decreased computational complexity from O(2^n) to O(n) by refactoring this loop to stop
         // running at the first unavailable time.
         let i = 0;
-        while (isAvailableToBeBooked === true && i < allBookingDates.length) {
-          const aDate = allBookingDates[i];
-          i++;
-          isAvailableToBeBooked = isAvailable(bufferedBusyTimes, aDate, eventType.length);
-          // We bail at the first false, we don't need to keep checking
-          if (!isAvailableToBeBooked) break;
+        while (!foundConflict && i < allBookingDates.length) {
+          foundConflict = checkForConflicts(bufferedBusyTimes, allBookingDates[i++], eventType.length);
         }
       } else {
-        isAvailableToBeBooked = isAvailable(bufferedBusyTimes, input.dateFrom, eventType.length);
+        foundConflict = checkForConflicts(bufferedBusyTimes, input.dateFrom, eventType.length);
       }
     } catch {
       log.debug({
         message: "Unable set isAvailableToBeBooked. Using true. ",
       });
     }
-
-    if (isAvailableToBeBooked) {
+    // no conflicts found, add to available users.
+    if (!foundConflict) {
       availableUsers.push(user);
     }
   }