holiday season
US /ˈhɑː.lə.deɪ ˌsiː.zən/
UK /ˈhɑː.lə.deɪ ˌsiː.zən/

1.
the period around Christmas and New Year's Day
:
•
Many people travel during the holiday season.
•
The stores are very busy during the holiday season.
the period around Christmas and New Year's Day