You can render the date string by setting a date format:
Please note that rendering a single label on multiple lines is not possible at them moment. If the labels overlap each other different labels can rendered on different lines so that they don't overlap however a single label is always on one line.
You can tell your axis to skip every other label like this:
"dd MMM hh:mm aaa"
To skip more labels increase the argument number.
Also you can use the label fit mode strategies if the labels become too cramped:
The fit modes can be multi-line, rotate and none.
Please write again if you need further assistance.
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