diff --git a/apps/web/modules/bookings/components/BookingDetailsSheet.tsx b/apps/web/modules/bookings/components/BookingDetailsSheet.tsx
index ee9bdfc607..0532bdc9bc 100644
--- a/apps/web/modules/bookings/components/BookingDetailsSheet.tsx
+++ b/apps/web/modules/bookings/components/BookingDetailsSheet.tsx
@@ -4,6 +4,7 @@ import dayjs from "@calcom/dayjs";
 import { useBookingLocation } from "@calcom/features/bookings/hooks";
 import { shouldShowFieldInCustomResponses } from "@calcom/lib/bookings/SystemField";
 import { formatPrice } from "@calcom/lib/currencyConversions";
+import { formatToLocalizedTimezone } from "@calcom/lib/dayjs";
 import { getPlaceholderAvatar } from "@calcom/lib/defaultAvatarImage";
 import { getUserAvatarUrl } from "@calcom/lib/getAvatarUrl";
 import { useLocale } from "@calcom/lib/hooks/useLocale";
@@ -445,14 +446,20 @@ function DisplayTimestamp({
   endTime: Date | dayjs.Dayjs;
   timeZone?: string;
 }) {
+  const {
+    i18n: { language },
+  } = useLocale();
   const start = startTime instanceof Date ? dayjs(startTime).tz(timeZone) : startTime;
   const end = endTime instanceof Date ? dayjs(endTime).tz(timeZone) : endTime;
+  const localizedTimezone = timeZone
+    ? formatToLocalizedTimezone(start, language, timeZone) ?? timeZone
+    : start.format("Z");
 
   return (
     <>
       <span>{start.format("dddd, MMMM D, YYYY")}</span>
       <span>
-        {start.format("h:mma")} - {end.format("h:mma")} ({timeZone || start.format("Z")})
+        {start.format("h:mma")} - {end.format("h:mma")} ({localizedTimezone})
       </span>
     </>
   );
@@ -507,6 +514,9 @@ function WhoSection({ booking }: { booking: BookingOutput }) {
               />
               <div className="min-w-0 flex-1">
                 <p className="text-emphasis truncate text-sm leading-[1.2]">{name}</p>
+                {attendee.phoneNumber && (
+                  <p className="text-default truncate text-sm leading-[1.2]">{attendee.phoneNumber}</p>
+                )}
                 <p className="text-default truncate text-sm leading-[1.2]">{attendee.email}</p>
               </div>
             </div>
diff --git a/packages/lib/dayjs/formatToLocalizedTimezone.test.ts b/packages/lib/dayjs/formatToLocalizedTimezone.test.ts
new file mode 100644
index 0000000000..60371bc61c
--- /dev/null
+++ b/packages/lib/dayjs/formatToLocalizedTimezone.test.ts
@@ -0,0 +1,91 @@
+import { describe, expect, it, beforeAll, vi } from "vitest";
+
+import dayjs from "@calcom/dayjs";
+
+import { formatToLocalizedTimezone } from "./index";
+
+beforeAll(() => {
+  vi.setSystemTime(dayjs.utc("2024-06-15T12:00:00Z").toDate());
+});
+
+describe("formatToLocalizedTimezone", () => {
+  it("returns a localized timezone string for a Date object with explicit timezone", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const result = formatToLocalizedTimezone(date, "en", "America/New_York");
+    expect(result).toBeDefined();
+    expect(typeof result).toBe("string");
+    // Should contain recognizable timezone name like "Eastern Daylight Time"
+    expect(result!.length).toBeGreaterThan(0);
+  });
+
+  it("returns a localized timezone string for a Dayjs object with explicit timezone", () => {
+    const date = dayjs.utc("2024-06-15T12:00:00Z");
+    const result = formatToLocalizedTimezone(date, "en", "America/New_York");
+    expect(result).toBeDefined();
+    expect(typeof result).toBe("string");
+    expect(result!.length).toBeGreaterThan(0);
+  });
+
+  it("returns consistent results for Date and Dayjs objects with same timezone", () => {
+    const jsDate = new Date("2024-06-15T12:00:00Z");
+    const djsDate = dayjs.utc("2024-06-15T12:00:00Z");
+    const resultDate = formatToLocalizedTimezone(jsDate, "en", "America/New_York");
+    const resultDayjs = formatToLocalizedTimezone(djsDate, "en", "America/New_York");
+    expect(resultDate).toBe(resultDayjs);
+  });
+
+  it("returns different results for different timezones", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const nyResult = formatToLocalizedTimezone(date, "en", "America/New_York");
+    const tokyoResult = formatToLocalizedTimezone(date, "en", "Asia/Tokyo");
+    expect(nyResult).not.toBe(tokyoResult);
+  });
+
+  it("returns a short timezone name when timeZoneName is 'short'", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const longResult = formatToLocalizedTimezone(date, "en", "America/New_York", "long");
+    const shortResult = formatToLocalizedTimezone(date, "en", "America/New_York", "short");
+    expect(shortResult).toBeDefined();
+    expect(longResult).toBeDefined();
+    // Short name should be shorter than or equal to long name
+    expect(shortResult!.length).toBeLessThanOrEqual(longResult!.length);
+  });
+
+  it("defaults to long timezone name when timeZoneName is not provided", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const defaultResult = formatToLocalizedTimezone(date, "en", "America/New_York");
+    const longResult = formatToLocalizedTimezone(date, "en", "America/New_York", "long");
+    expect(defaultResult).toBe(longResult);
+  });
+
+  it("works with undefined locale (falls back to environment default)", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const result = formatToLocalizedTimezone(date, undefined, "America/New_York");
+    expect(result).toBeDefined();
+    expect(typeof result).toBe("string");
+    expect(result!.length).toBeGreaterThan(0);
+  });
+
+  it("handles UTC timezone", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const result = formatToLocalizedTimezone(date, "en", "UTC");
+    expect(result).toBeDefined();
+    expect(result).toContain("Coordinated Universal Time");
+  });
+
+  it("handles Europe/London timezone", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const result = formatToLocalizedTimezone(date, "en", "Europe/London");
+    expect(result).toBeDefined();
+    expect(typeof result).toBe("string");
+    expect(result!.length).toBeGreaterThan(0);
+  });
+
+  it("handles Pacific/Auckland timezone", () => {
+    const date = new Date("2024-06-15T12:00:00Z");
+    const result = formatToLocalizedTimezone(date, "en", "Pacific/Auckland");
+    expect(result).toBeDefined();
+    expect(typeof result).toBe("string");
+    expect(result!.length).toBeGreaterThan(0);
+  });
+});