Easter has no fixed date.

复活节无固定日期。

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Deloitte said no fixed date had been set for the closure of the 66 identified stores, which would continue to trade in the meantime.

BBC: HMV announces 66 store closures

There is still no fixed release date for Halo 3 - Mr O'Donnell says the game has to pass the "Bungie test" first.

BBC: NEWS | Technology | Halo aims for epic end to trilogy

The fact that early bonds had no fixed maturity date ensured that any change in interest rate was fully reflected in the capital value of the bond.

ECONOMIST: What did early 19th-century literary characters live on?