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I hope you have a mother's eightieth birthday. May the mother in the New Year, happy everyday, day by day with laughter.

祝母亲的八十岁生日，愿母亲在新的一年中，天天都愉快，日日有笑声。

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The celebration also marks the eightieth anniversary of Congress' declaring "The Star-Spangled Banner" as the national anthem.

VOA: special.2011.03.07

If you want to watch Ben-Hur in the original aspect ratio of 2.76:1, Autoscope can handle it by moving a mask over the screen at an eightieth of an inch.

ENGADGET: Runco @ CEDIA - 1080p projectors HD

And profits after tax were a billion dollars, an eightieth of what the company is likely to be worth when shares are traded.

BBC: Facebook and Glenstrata: Which is bubblier?