A data refresh with Gateway Enterprise changes date from 00001-01-01 to 1899-12-30

Hi,

When my report is prepared and published, I have a colum with Estimated Date of Arrival showing me a Date. Where my date is 0001-01-01, the report shows an empty Date.

This is how I also want it to be shown.

After a data refresh from the Gateway

the report suddenly shows another Date: 1899-12-30.

What can I do to keep the date empty?