holiday plans; vacation schedule
Refers to planned time off from work or school, including dates, destinations, or activities.
Have you already decided your holiday plans for this summer?
Please write your vacation schedule on the calendar.
休暇 means 'holiday' or 'time off' in general, while 休暇予定 specifically refers to the plans or schedule for that time off.
予定 means 'plan' or 'schedule' broadly; 休暇予定 narrows it to plans specifically for holidays or vacations.
Compound of 休暇 (kyūka, 'holiday, vacation') and 予定 (yotei, 'plan, schedule').