in the Roman calendar: the 15th of March or May or July or October or the 13th of any other month
例句
例句
Beware the ides of March. 注意三月十五日。
The ninth day before the ides of a month; in the ancient Roman calendar, the seventh day of March, May, July, or October and the fifth day of the other months. 古罗马历中自三、五、七、十各月的十五日起算的前第九日即三、五、七、十各月的第七日; 其它各月的第五日