Early 1981. I'll accept Xennial, but feel far closer to Gen X than actual Millenials. I was an adult in the 20th Century. I was pissed off to be given a mobile phone at 17- it was a PITA, too big to go in a pocket, an aerial sticking out, could only hold 8 SMSs. It was a couple of years off from Nokias taking over with cool features like Snake.
Most of the educational reforms of the Millenial age group hadn't come in, or came in later schooling (SATS-only did them in y9, GCSEs were linear, pre-AS/A2 levels). Corporal punishment was still legal in schools when I started, and there wasn't a "you can't touch me" culture that phased in with younger year groups that persists today.
Most of my friends are Gen X, and having grown up with an older sibling and having a long memory, I remember much of the 80s. Yuppies, mobile phones like breeze blocks, car phones, pre-car seats (and often seat belts), sitting in the boot, strikes, Live Aid, Channel 4 being a new channel, and Channel 5 was a bit of a joke when it launched in my teen years, AIDS, the unrelenting tedium of Sunday afternoons in Winter prior to Sunday opening, Marathon bars and Opal Fruits having stupid name changes, 5ps shrinking from being the size of current 10ps to the size of a halfpenny. If you wanted information, it was still encyclopaedias or for something topical, Ceefax/ Teletext. Colour photos on the front page of the newspaper was an exciting innovation!
I was 16 before New Labour won the general election.
Being married to a Gen Xer, financially I don't feel represented by Millenial issues either although I won't be able to dodge changing pension ages.
It's a transitional age group, but my childhood and teen years were very much analogue with far more in common with older age groups than younger.
I still love a mix-tape even if the DJ spoke over the song 😂