Giggs reaches the milestone in November and is set to become only the fourth outfield player aged over 40 to appear in the Premier League after Gordon Strachan, Kevin Phillips and former team-mate Teddy Sheringham.
“Apparently 40 is the new 30, so I am looking forward to it,” Giggs told the United match-day programme ahead of Saturday's home game with West Bromwich Albion.
“I know it’s quite daunting for some people, but you just have to embrace it, not worry too much about it and just enjoy yourself. That said, I might try and keep my birthday a secret from all the lads when it comes round. That might prove tough though.”