Giggs, whose birthday is on November 29, will soon join a select club of outfield players to appear in the Premier League beyond their 40th year.
The Welshman's former Red Devils teammate Teddy Sheringham, one-time United midfielder Gordon Strachan and Crystal Palace striker Kevin Phillips are the only men to reach the milestone.
"Apparently 40 is the new 30 so I am looking forward to it," Giggs told United Review.
"I know it is quite daunting for some people but you just have to embrace it, not worry too much about it and just enjoy yourself.
"I've never really put too much stock in my age - to me it is more about how you feel and I feel pretty good at the moment.
"That said, I might try and keep my birthday a secret from all the lads when it comes round. That might prove tough though."