We're open till 6 o'clock.

我们营业到6点钟。

《牛津词典》

The shop keeps open till midnight.

那个商店一直开到午夜。

youdao

Shops remain open till late in the evening.

商店一直开到晚上很晚。

youdao

But I think they'll be open till about 4, 5, 6 in the morning.

但是我想，它们会开到凌晨四五六点钟的样子。

愉快的卡姆登的夜晚 - SpeakingMax英语口语达人

Rendering visits even more spookily evocative, the Colosseum is open till midnight on Saturdays from 21 August to the 23 October 2010.

BBC: Going underground at the Colosseum

After arriving in the checkout queue just ahead of his opponent, Mr McEnroe is distraught to see an employee appear and open another till, giving Mr Borg the upper hand.

ECONOMIST: Retail surveillance

"We want the polling stations to stay open tonight, till midnight if necessary, " Mr. Alvi said.

WSJ: Karachi Beset by Political Strife