TimeLine Starting Date dynamic

I did something like this by making two new fields:

[Start Date for Timeline]

[End Date for Timeline]

My start date I wanted to only show it was 4 weeks ago or 90 days ahead, unless the start date was really old, but the project was ongoing, then i just set the start date for exactly 4 weeks ago (just to be sure the start date existed in the realm)

[Start Date for Timeline] = 

var date Start = [Start Date]

If(
  $Start>Today()-Days(28) and $Start < Today() + Days(90), $Start, 
  $Start<=Today()-Days(28) and not IsNull([End Date for Timeline]), Today()-Days(28),
  null)

End date was only shown for that 4 week to 90 day period. I have 97 in my formula because in the event the start date was 90 days out, then the end date would be 97 days out so at least i would show a week of that project (or else my start and end date in the exact scenario would look like a single day).

var date End = [End Date]

If($End>=Today()-Days(28) and $End < Today() + Days(97), $End)

I think if you change the 28 days to 7 days, and the 90 days to 60 days, that should work for your purposes.

I guess it is true that my formulas really only make it so the min date is a week prior and the max date is 60 days out. however, if no projects exists on those extremes, the timeline will be smaller. Only way I can think of always having a set timeline at both extremes is to make a psuedo event, and in the start date formulas i posted add a first line that basically sets the pseudo event to the extremes. This would mean your timeline would always have one psuedo event with the entire duration of the timeline. I think i remember running into that limitation even with my work around, but we had enough projects happening where my extremes are almost always satisfied.