U2 Announces Final Dates At Sphere In Las Vegas U2 announced the final four dates for  U2:UV Achtung Baby Live At Sphere . February 23rd and 24th, and March 1st and 2nd will mark 40 nights of concerts at one venue. The record-setting shows at Sphere represented U2’s first live outing in four years, while at the same time they topped Billboard’s Alternative Digital Song Sales Chart and B illboard’s Adult Alternative Airplay Chart with “Atomic City.”