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.”
Photos: Katrina Kaif, Shamita Shetty at Mumbai airport
Photos: Varun Dhawan, Alia Bhatt promote 'Badri...' on 'Dil Hai Hindustani'
In pictures: 15 facts about kissing that will surprise you
Photos: Shahid Kapoor and Mira Rajput at cafe in Bandra
Photos: Deepika Padukone, Neha Dhupia and Soha Ali Khan at event