Off-peak day平日价
Cooling-Off Day冷静日;沉着日
accouting cut-off day会计期间中止日
a two-day off一个为期两天掉;两一天;关闭两天
Take a two-day off请两天假
N-COUNT（可数名词） If someone has an off day, they do not perform as well as usual. 未能发挥正常水平; 状态不佳 [非正式]
A teacher who merely has an off day in the classroom cannot be dismissed for incompetence.
一个教师偶尔在课堂上发挥欠佳不能被看成不称职而遭免职。