Currently all timestamps shown on the system always refer to "my time" meaning the time of the user currently looking at them. If I look at a project which is happening in another timezone I might be interested in understanding when e.g. progress was updated in the "projects timezone":
We could always show "my time" but have to make clear where it is (4:00am Berlin)
We could always show project timezone on everything (6:00am Dubai)
We could show both (4:00am Berlin, 6:00am Dubai)