Easter has no fixed date.

复活节无固定日期。

youdao

There's certainly no fixed maturity date: Money shows up in irregular chunks as people pay down their mortgages at unpredictable times-for instance, when they decide to sell their house.

而且没有固定的到期日：几时能收回钱是不知道的，因为人们支付他们的抵押贷款时间是不可预测的，这个时间举例来说，当他们决定出售他们的房子的时候。

youdao

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?