From a3c10d0beb491cdccd97da16f3dc0227ab20199d Mon Sep 17 00:00:00 2001
From: Alex van Andel <me@alexvanandel.com>
Date: Wed, 22 Feb 2023 21:36:30 +0000
Subject: [PATCH] Amend logic to figure out the months between dates (#7289)

---
 apps/web/pages/[user]/calendar-cache/[month].tsx | 2 +-
 packages/core/CalendarManager.ts                 | 7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/apps/web/pages/[user]/calendar-cache/[month].tsx b/apps/web/pages/[user]/calendar-cache/[month].tsx
index d1a8bfbf54..d866b027a2 100644
--- a/apps/web/pages/[user]/calendar-cache/[month].tsx
+++ b/apps/web/pages/[user]/calendar-cache/[month].tsx
@@ -30,7 +30,7 @@ export const getStaticProps: GetStaticProps<
     },
   });
   const startDate = (
-    dayjs(month, "YYYY-MM").isSame(dayjs(), "month") ? dayjs() : dayjs(month, "YYYY-MM")
+    dayjs(month, "YYYY-MM").isSame(dayjs(), "month") ? dayjs.utc() : dayjs.utc(month, "YYYY-MM")
   ).startOf("day");
   const endDate = startDate.endOf("month");
   try {
diff --git a/packages/core/CalendarManager.ts b/packages/core/CalendarManager.ts
index 173bca9ee1..c5172c0f61 100644
--- a/packages/core/CalendarManager.ts
+++ b/packages/core/CalendarManager.ts
@@ -1,4 +1,4 @@
-import { SelectedCalendar } from "@prisma/client";
+import type { SelectedCalendar } from "@prisma/client";
 import _ from "lodash";
 import * as process from "process";
 
@@ -10,7 +10,7 @@ import { WEBAPP_URL } from "@calcom/lib/constants";
 import logger from "@calcom/lib/logger";
 import { performance } from "@calcom/lib/server/perfObserver";
 import type { CalendarEvent, EventBusyDate, NewCalendarEventType } from "@calcom/types/Calendar";
-import { CredentialPayload, CredentialWithAppName } from "@calcom/types/Credential";
+import type { CredentialPayload, CredentialWithAppName } from "@calcom/types/Credential";
 import type { EventResult } from "@calcom/types/EventManager";
 
 const log = logger.getChildLogger({ prefix: ["CalendarManager"] });
@@ -193,9 +193,8 @@ export const getBusyCalendarTimes = async (
     results = await getNextCache(username, dayjs(dateFrom).format("YYYY-MM"));
   } else {
     // if dateFrom and dateTo is from different months get cache by each month
-    const monthsOfDiff = dayjs(dateTo).diff(dayjs(dateFrom), "month");
     const months: string[] = [dayjs(dateFrom).format("YYYY-MM")];
-    for (let i = 1; i <= monthsOfDiff; i++) {
+    for (let i = 1; dayjs(dateFrom).add(i, "month").isBefore(dateTo); i++) {
       months.push(dayjs(dateFrom).add(i, "month").format("YYYY-MM"));
     }
     const data: EventBusyDate[][][] = await Promise.all(months.map((month) => getNextCache(username, month)));