There are quite a few people here who use Indesign. I think most do not. Please be aware that the output from ID is flawed an needs correction afterwards.
Load the resulting ePUB into Sigil and press validate there. The error messages are much more useful there and the date issue can be solved there in the metadata. Sigil will ensure that you use the right format. The problem is not the date in your system, but the date in the ePUB.
I am sure that the encrpytion is a result from a choice in exporting to ePUB from ID. You can solve that probably without an issue in Sigil.
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