How to specify time to plan route where conditional access roads are taken into account

Hello, we’re looking to utilize conditional access for some roads in our maps (for roads that are only open seasonally) - via the access:conditional tag from OSM.

However, we do route planning weeks in advance and would need some way to say “please provide the route as at this point in time” so that the conditional access routing is accurate for that point in time.

How could we do this?

Regards,
David

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