if you are using Telerik RadScheduler TimelineView,
<TimelineView
UserSelectable="false"
GroupBy="Room"
GroupingDirection="Vertical"
ColumnHeaderDateFormat="dd"
HeaderDateFormat="M"
SlotDuration="12:00:00"
TimeLabelSpan="2"
ShowInsertArea="false"></TimelineView>
TimeLabelSpan property gives you some trouble such as alignment problems. to solve the issue, set the code snippet to your css file.
.rsHidden { display:table-row !important;}