*pause for dramatic effect*
...is a very good question.
The babies were born on May 15th. That makes them about 5 1/2 months old (25 weeks). But since they were born just under 28 weeks gestation, that changes things.
Their due date was August 8th. So their adjusted age is almost 3 months old (13 weeks).
Most of this is irrelevant since we don't really go anywhere beside doctor appointments so we pretty much avoid all the questions and explanations that it requires to tell people how old they are.
When we take the babies out to doctor appointments we usually have them covered to protect them from Black Plague that's lurking in every doctor's office and hospital. That also helps us avoid curious people. And then when an alarm starts beeping because one of the babies is stretching, crying, fussing, or one is trying to get my attention by holding their breath and faking their death, most people avoid us like we have the plague. It works pretty well, I guess. :)
We are told that around the ages of 2 to 3-years old, we won't have to correct their age anymore and we'll be free to tell people their age from birth instead of constantly trying to remember what week they're at in real time...and adjusted time. Honestly, most of the time I can't remember either age, especially in weeks, and to calculate from their birth and their due date is way too hard for this sleep-deprived brain.
So, we have twins. They're both babies. And they're both boys.
"Are they identical?"
Well...yes, they are.
"Really? They don't look identical."
That's a story for another day. :)