HOLIDAYa day when you work or go to school either in the morning or the afternoon, but not all day 只上半天班[学]的一日
Friday is my half day off.
星期五我休息半天。
Examples from the Corpus
half day• Until then, I, like many parents, thought there were two choices: half day or full day.• She probably has one half dayfree per week, and then she will have to visit her parents, no doubt.
ˈhalf-dayadjectiveadj [only before noun]
a half-dayevent takes place in either the morning or the afternoon 半天的