Change was very much the order of the day in that time in our country's history.我国历史上那个时期的特点是变化。

Wasteful government spending seems to be the order of the day.政府铺张浪费似乎已然成风。

At the resort's outdoor café, bathing suits and sandals are the order of the day. [=they are popular and appropriate]在这处旅游胜地的室外咖啡店里很流行穿泳衣和凉鞋。