If you mean how long has the band been active or "how old", they've been playing as a a band for 3 years, since December 3rd, 2011.
If you're wondering their individual ages, Ashton Irwin (drummer/vocals) is 20 years old, --almost 21-- born July 7th, 1994. Calum Hood (bass/vocals) is 19 years old, born January 25th, 1996. Luke Hemmings (guitar/vocals) is 18 years old, --almost 19-- born July 16th, 1996 and Michael Clifford (guitar/vocals) is 19 years old, born November 20th, 1995.
Hope that helped!
well there whole group started in 2011 hope thats a big help
Michael Clifford, one of the members, came up with it while in a science class. There isn't a specific reason why, but they had a list of band names. They chose 5 Seconds of Summer. :) In a Youtube video, called "5 seconds of summer info !" it shows him and his band member, Luke, trying to figure out a name.
As of now (April 2015), he is 18 years old. His birthday is July 16th, 1996, by then he'll be turning 19.
Ashton Irwin
pop rock
5 Seconds of Summer have 2 albums, '5 Seconds of Summer' (their debut album) and 'LIVESOS' (a live album).
Yes, they have written all the songs on their album (5 Seconds Of Summer) except for Amnesia
Yes, 5 Seconds of Summer write their own songs and play their own instruments.
Luke
The sexy drummer in 5 seconds of summer.
Creating 5 seconds of summer
The band 5 Seconds of Summer - Luke Hemmings, Michael Clifford, Calum Hood, and Ashton Irwin - live in the Sydney, Australia area.
gibbon
5 Seconds of Summer
75 years
Camryn and 5 Seconds of Summer.
As it stands, it's uncertain who will sing the 'KC Undercover' theme song. It could be a number of bands, including 5 Seconds of Summer.