lib/actions/appointments.ts

@@ -392,9 +392,14 @@ export async function scheduleAppointment(id: string, input: ScheduleAppointment
     throw new Error("Authentication required.");
   }
 
+  // Get user's timezone
+  const userTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
+
   // Build payload with defaults
   const payload: any = {
     ...input,
+    // Always include timezone when scheduling with datetime
+    ...(input.scheduled_datetime && { timezone: input.timezone || userTimezone }),
     // Default create_jitsi_meeting to true if not specified
     create_jitsi_meeting: input.create_jitsi_meeting !== undefined ? input.create_jitsi_meeting : true,
   };

lib/schema/appointments.ts

@@ -37,11 +37,12 @@ export type CreateAppointmentInput = z.infer<typeof createAppointmentSchema>;
 
 // Schedule Appointment Schema (Admin only)
 // Supports two scheduling methods:
-// 1. Direct datetime: scheduled_datetime + scheduled_duration
+// 1. Direct datetime: scheduled_datetime + scheduled_duration + timezone
 // 2. Date and slot: date_str + time_slot + scheduled_duration
 export const scheduleAppointmentSchema = z.object({
   scheduled_datetime: z.string().datetime("Invalid datetime format").optional(),
   scheduled_duration: z.number().int().positive().optional(),
+  timezone: z.string().optional(),
   date_str: z.string().regex(/^\d{4}-\d{2}-\d{2}$/, "Date must be in YYYY-MM-DD format").optional(),
   time_slot: z.enum(["morning", "afternoon", "evening"]).optional(),
   create_jitsi_meeting: z.boolean().optional(),