Is there anyway to set the 'creation_date' setting at index creation?

Hey folks,

I have the requirement to import a large amount of data into elastic search.
These indices will be managed using ism policies. Specially we would like new and ‘newly imported’ indices to be deleted after X amount of days.

Does open distro support the concept of setting the ‘creation_date’ setting at index creation time?
Or is this something i need to manage myself (which i’m trying to avoid).

Thanks,