There is no way to delete all entries in the timeline and with many, many entries, it would be convenient and certainly a big timesaver to be able to delete all of the entries at one time.  Better yet, if this is possible, allow the user to delete all entries from [date] to [date].
customized Desktop PC (Haswell i7 4770 3.4 gHz with 32 GB RAM), Windows 10 Pro 64-bit, 256 GB SSD,  and a Microsoft Surface Pro 6, Windows 10, 512 GB SSD, 16 GB ram, i5
This can be accomplished with reports. However I added a feature request for reports to include variables such as relative dates.

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