“节日期间”常见的英文表达有 during the holiday period、during the festival season 或 during the holiday season，具体使用可根据语境调整：
1、 During the holiday period（强调特定时间段内的节日活动）
例句：
During the holiday period, many shops offer special discounts.
（节日期间，许多商店提供特别折扣。）
2、 During the festival season（侧重节日氛围或特定文化节日）
例句：
During the festival season, the city is decorated with colorful lights.
（节日期间，城市被五彩灯光装饰一新。）
3、 During the holiday season（通用表达，适用于西方节日如圣诞节等）
例句：
During the holiday season, families often gather for meals.
（节日期间，家人常会聚餐。）
注意事项：若指特定节日（如春节、圣诞节），可补充具体名称，如 during the Spring Festival period 或 during the Christmas season。
口语中也可简化为 over the holidays（如 I'll be visiting relatives over the holidays.）。
根据语境选择最贴切的表述即可。