Convert Data Type from Text to Date and into a Different Date Format

Coming back to this, I realize the function I proposed is not the right one.  Date.ToText assumes your values are already Date type, but yours are text.

Did you say some of your values are in general format vs date?  Does that mean you input table looks like the column on the left (dates stored as integers and date formats).

If so, you can use a formula like this to convert each type differently.  We may now be beyone the more elegant solution you initially requested, but I will share this anyway in case it helps.

= if Text.Contains([Date], "/") then Date.ToText(Date.FromText([Date]), "dd/MM/yyyy") else Date.ToText(Date.AddDays(#date(1899,12,31), Number.FromText([Date])-1), "dd/MM/yyyy")

The above is an added custom column, and you should be able to convert it to Date in the following step.

If this works for you, please mark it as the solution.  Kudos are appreciated too.  Please let me know if not.

Regards,

Pat