Use the pre-configured Time Series chart, or convert the X Value to a string with format yyyy-MM-dd like so:
formatDateTime($date, 'yyyy-MM-dd')
If you use an export mapping you can set a converter there.
It’s to show of a demo for the speed and ease of use with Mendix so formatting DateTime is a good workaround but breaks the flow of my demo a bit, i’ll give the time series chart a try!
Thanks