# Calling all builders and tech tree climbers! ## Join us tomorrow, FRIDAY, 15th September, 1pm UTC for a 45-minute deep dive about Tech Trees with our tech lead [Ken Miyachi](https://near.org/near/widget/ProfilePage?accountId=kenjon.near). ### But what are Tech Trees? Find out tomorrow! # [RSVP HERE](https://shortlink.near.foundation/horizon-office-hours-rsvp)