At this point, no. You’d have to look at a 3rd-party app like Advanced Formula Booster for this. This app allows you to create formulas like the one you created (although in a more user-friendly way, because it accommodates multiple lines/instructions, therefore you don’t need to nest functions into other functions) and cast the result to a regular column (a date column in your case).
Thank you for the answer. This is pity. Do you know if this functionality is in the future roadmap at least? I do not want to pay to third party company.