Thanks for sharing your idea. But before, I want to completely understand the benefits or outcomes you are expecting.
Why would it be useful?
What's the impact for the players after adding this feature?
Would it also be useful to display when does the server 'resets'?
Its usefulness is not having to keep an eye on the clock ... simple example: I do activities on the moon, I forget and after 10 minutes I look at the game screen and I know that the last page update is at that time.
More control over the time of the last activity.
PS :is a function also available in AntiGameOrigin, I think it is one of the most useful.