noun
summer vacation; summer break
Often used in business or formal settings to refer to a summer holiday period, similar to 夏季休暇.
当社の暑中休暇は8月13日から16日までです。
Our company's summer vacation is from August 13th to 16th.
Compound of 暑中 (shochū, 'mid-summer, hottest period') and 休暇 (kyūka, 'vacation, holiday').