4 years for me till I hit 30 though I'm not too worried about yet. After all I don't meet the minimum requirements for being 30 yet. You need to have a mortgage, be married and/or have children plus hate snowy weather because it makes getting to work a hassle. If you don't meet those requirements you just cap out at age 29 until you do meet them. That's how ageing works right?
the years have kind of been nice to me so far as I often get mistaken for not even being in my 20s which I now take as a compliment when it used to annoy me when I was younger. However I do worry that the years will catch up with me eventually. I kind of imagine I'll go to bed on the eve of my 40th still only looking at most late twenties and wake up the next day with a massive beer belly, bald head and constant back pain because I believe life is just cruel like that.
What I'm trying to say is if there is deity, benevolent or otherwise that would like me perform their bidding in exchange for eternal youth I am open for bids.