When Special Relativity was invented the age of universe was not known, and the topic question was as far as I know not adressed in advance. So what is the answer? It seems obvious that the speed which the universe gets older by (Edit: as you perceive it), is a function of the speed of your frame relative to the universe. The faster your speed, the faster the universe seems to grow old. And it takes you a longer time to discover how old the universe was at a certain moment in your local time. But still the universe may perhaps have the same age everywhere independently of our speed.
Perhaps its a problem there because if it is so then it seems you can define simultanity without using light rays and middle points:
If the age of the universe is the same for two events then they are simultaneous.
Measuring the age of the universe directly seems an unpractical method but cant we use a clock
(Edit: and this is the sWclock.) that alters its speed depending on what changes of speed it happens to experience? Accelerate and the clock will speed up so its speed always is the same as the speed the universe ages with. Then comparisation of speeds with an ordinary clock showing local time will reveal your actual speed through space!
Is this possible or is something wrong?