call it a day

It's already 8 p.m.—let's call it a day and pick this up tomorrow morning.已经晚上八点了——今天就到这里吧，明天早上接着弄。

After twelve hours of negotiation, both sides agreed to call it a day and resume the next morning.经过十二个小时的谈判，双方同意今天收工，第二天早上继续。