Hey guys.
So I have this Powerapps vacation app where the user chooses 4 periods of time to take vacation, then through a flow this data are inserted in a Sharepoint list and to a Sharepoint Calendar. And it´s in this last step where the error occurs.

Here is the work flow
(Lets focus only on the 1st period)
Here are the 2 variables (Start Date and End Date) (Portuguese speaker here :p)

The flow follows and these two dates are successfully inserted in the list.

Finally when I try to insert this event on the shared calendar...the flow fails


Traduction: The "inputs.parameters" of the "Create_item_2" workflow operation of type "OpenApiConnection" is not valid. Error details: The input parameter "item/EventDate" must be of type "String/date-time". The runtime value ""18/04/2022"" to be converted does not have the expected format "String/date-time".
Allready looked into several questions but none of them solved my problem.
Any help please?
Thanks in advance