Last updated: 2025 – Applies to DT6507 firmware versions v2.0 through v3.4.
A: The DT6507 chipset is licensed to multiple factories. Button placement varies. Use these instructions as a baseline; for physical layout differences, search for “DT6507 variant XY.”
For year setting (rare on DT6507), continue pressing SET after day – but most basic models omit the year.