I'm going to be down voted, but to be honest you have lots of birthdays, as long as you celebrate at some point, does it really matter? Most people celebrate their birthdays on the nearest weekend anyways. It sucks but try to be happy for them, most people only get engaged once.

Yesterday was my birthday too OP, my family went out to dinner without me. I know how it feels to get overshadowed by siblings, but I promise you, it doesn't last forever!

Did they completely forget your birthday? I think it's pretty unacceptable to be honest. They're your family. If they can celebrate your brother's engagement then they should be able to celebrate your birthday. Hopefully they have something planned this weekend? Sorry OP, it's not nice to be ignored on what I feel is quite an important day. But congrats to your brother and Happy Birthday

Maybe it's the only time your family would be gathered together and they were happy and proud? Maybe just be happy for them too

Yesterday was my birthday op! I turned 26 and only 3 out of my seven sisters said happy birthday and I heard nothing from my dad! They where all still ohing and ahing over the fact my nephew turned two on the 23! Don't feel bad! Happy belated birthday