fix: calendar cache date ranges (#18237)

Co-authored-by: Keith Williams <keithwillcode@gmail.com>

packages/app-store/googlecalendar/lib/CalendarService.ts

@@ -724,9 +724,9 @@ export default class GoogleCalendarService implements Calendar {
   async fetchAvailabilityAndSetCache(selectedCalendars: IntegrationCalendar[]) {
     const parsedArgs = {
       /** Expand the start date to the start of the month */
-      timeMin: getTimeMax(),
+      timeMin: getTimeMin(),
       /** Expand the end date to the end of the month */
-      timeMax: getTimeMin(),
+      timeMax: getTimeMax(),
       items: selectedCalendars.map((sc) => ({ id: sc.externalId })),
     };
     const data = await this.fetchAvailability(parsedArgs);

packages/features/calendar-cache/lib/datesForCache.ts

@@ -9,7 +9,7 @@ export const getTimeMin = (timeMin?: string) => {
 /** Expand the end date to the end of the next month */
 export function getTimeMax(timeMax?: string) {
   const date = timeMax ? new Date(timeMax) : new Date();
-  date.setMonth(date.getMonth() + 2);
+  date.setMonth(date.getMonth() + 1);
   date.setDate(0);
   date.setHours(0, 0, 0, 0);
   return date.toISOString();