When does 3rd trimester start?

Question

I just completed my 26th week today... Some sites say 26th week & some say 27th week.. Not a big deal just curious.

Answer

I use this.

Answer

I thought it was 28

Answer

Found this and thought it would be helpful

Answer

Glow just welcomed me into the 3rd trimester and I'm 26 weeks. I'm so confused lol

Let's Glow!