A notice posted classroom door said no because of the blackout afternoon.

教室门上贴了通知说由于停电下午没课。

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Blackout Dates above can be varied at any time without any further notice.

以上限定日期若有变动，恕不另行通知。

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Air China blackout dates are subject to change without further notice.

以上限定日期若有变动，依中国国际航空公布为准，恕不另行通知。

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Additionally, Bush's proposals would have company executives undertake responsibility for the employee's investments during such "blackout periods" when workers are not permitted to sell, and require a 30-day notice before such a blackout period can begin.

CNN: Bush: 401(k) proposals are about 'fairness'