President Kaunda fulfilled his promise of announcing a date for the referendum.

卡翁达总统实现了他的关于宣布投票公决日期的诺言。

《柯林斯英汉双解大词典》

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However, the value of this pledge has been reduced by the lack of an agreed start date from which the emission cuts should be measured, making it a distant promise.

然而，这一承诺的价值却由于未能对减排测量的开始日期达成一致而大打折扣，使之成为一个遥不可及的承诺。

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Promise me a date if I just deliver these 60 tonnes of nanotech to Reticulon Blarg, three solar systems away, on Twitter.

FORBES: Connect

There is diplomacy to be done at home as well as abroad with Tory Eurosceptics who will question the worth of a referendum promise without a date attached and who will demand to know what the prime minister would do if he cannot get his way in negotiations.

BBC: Europe - Why Cameron's speech is proving so hard to write

On 2 June he won a no confidence vote in the Diet (parliament), only by making a promise to step down at a future date.

BBC: Japan PM Naoto Kan announces resignation amid criticism