All this time I thought they were doing fist-bump, but apparently Iggy searching for his fallen specs and Noctis picking it up for him..??
Kara doesn't know when her birthday is. After taking a pod to Earth, spending a while in the Phantom Zone, and the varying lengths of days/years between Earth and Krypton, there was no way to keep track. The Danvers usually celebrate the day she arrived. Meanwhile, Lena hears that, and spends days calculating the trajectory of Kara's pod, lets slip to Clark that she knows he's Superman to get the specs for his pod, finds out what she can about Krypton... to give Kara a surprise, real birthday.