No, according to how we use the term - exitence presupposes this, it's shaped by it. If you want to posit a concept of existence that does not have a time part of it feel free to do so.
In case you hadn't noticed, one has been posited on a number of occasions. In order to have created the universe and all that is within it - including time - God must have been just what you have asked for.
So I can posit a four sided triangle and that will make sense? If it doesn't then the same issue applies to existence without a concept of time.
I see what you did there, you mentioned something logically not possible and hoped some of it's ridiculousness would rub off. There is no obvious link between time and existence that just seems to be an assumption drawn from philosophical naturalism. Perhaps you would like to show your working out.
Except there is am obvious link between time and existence since it is at statement about something being. This has a built in statement about time as indeed all our language on this does.
It is exactly the same as the four sided triangle because a non temporal existence is definitionallly contradictory. Merely waving your hands and saying of course non temporal existence makes sense is the equivalent of waggling your pink painted arse and saying of course you can have a four sided triangle.
Nearly you have merely reasserted your original assertion.
What is the link between time and existence?
Secondly, Isn't there a question mark within physics and certainly within maths about time itself?
Read anything about the philosophy of existence and time does not seem to feature. I don't think it is that fundamental to being.
Then we are back to the issue of an eternal universe, what meaning does time have for an eternal infinite without end or beginning universe?
If it has none then any eternal being can as it were claim the same privileges.
Not only did you make the category error of a four sided triangle once you made it again.
So I ask you again show your working out. How is time fundamental to being