Ketubah Date Not on the Wedding Day

In the ketubah, the date was written before sunset, and the kinyan on the ketubah was made before sunset, but the chuppah and the witnesses' signatures were after nightfall. Are there any authorities who consider such a ketubah invalid? And should we be concerned about these opinions?

There are contemporary authorities who argue that this should not be done because the witnesses testify about an action that has already taken place, and they believe that in such a case, the witnesses are invalid. However, among the early authorities, it is explained the opposite, that the narrative of events pertains to what will be, and therefore there is no impediment to making the kinyan beforehand, and there is no concern at all.

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