In my week view the scheduler.templates.event_header appears too small. There are only shown the start-times, but not the end-times.
See:
Can I insert a line break to make the field bigger?
Or can I set the week view only to “working week”, so that the Saturdays and Sundays won’t appear anymore (see my thread here)?
It will shorten date string, so it will be fully visible.
As for multiline - header, height of header is fixed in css, and while it can be changed, there is no guarantee, that it will not have any unwanted side-effects.
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