There is no official decoding of the letters DF on the website <https://www.dfrobot.com/about-us?> I am surprised that Wikipedia lists two decoding versions: “Drive the Future” and “Dream Factory”. But there should be one correct version (not two), and officially confirmed. Can someone ask this question to the DFRobot team?

Thanks for the answer. But I have more questions. Why are there no 8 holes in the DS3231M, Fermion: AS7341 (and so on) modules (see the pictures below)? If I understand correctly, the contact pads are only needed for mechanical fastening of the modules. If they were connected to the GND, then 8 holes would improve the electrical contact. But the contact pads are isolated from the circuit's radio components. Then why do we need 8 metallized holes at all?