Discovered at the Leap Year Celebration 2020 (Horowhenua) event, at Ohau.
I started geocaching 27-09-11, and the 11-11-11 event in Tawa (Wellington) was my very first event attendance. For someone with only ~20 finds, I discovered ~150 TBs that day 😛.
I didn't understand TBs sufficiently to think to buy my own 11-11-11 coin to commemorate going to my first event, but fortunately the Seagnoid gave me one a few years later.
Thanks for sharing yours 🙂