high season
US /ˈhaɪ ˌsiː.zən/
UK /ˈhaɪ ˌsiː.zən/

1.
musim puncak, musim sibuk
the time of year when a particular holiday or tourist destination is most popular and prices are highest
:
•
Traveling during the high season can be very expensive.
Melancong semasa musim puncak boleh menjadi sangat mahal.
•
The hotel is fully booked for the entire high season.
Hotel ini ditempah sepenuhnya untuk sepanjang musim puncak.