I have recently found a potential source of confusion when viewing forthcoming events in the Timeline.
Because the year of the event is not shown, if the "ALL" filter is used and the list includes deadlines extending way into the future (next year, the following years, etc.), the display may confuse: we can see see an event due in April that, apparently, **follows** one taking place in August, for example. This is not a bug - it's because that the April event pertains, say, to 2020 while the July one to 2019.
I think displaying the year info can increase clarity and speed of processing of the Timeline deadlines.
There is a mild code improvement suggested in the Tracker that could help insert the year info - if interested, please VOTE for https://tracker.moodle.org/browse/MDL-64064 .