Greetings,
I have the same problem and I have tried to convert the data in date format obtained from pulldata with int() and number () as Kobotoolbox support points out, I have also tried using date() and it works perfect in Enketo environment but it does not show the values in KoboCollect. I have been trying for several days but I have not found the way and I need to solve it urgently.
In Enketo it works perfect
Here I have also addressed it Question
