I bought one of the modules with the itsy-bitsy socket because I wanted to see whether it was practical to incorporate it in by PCB design. I decided against it but the boards themselves were the same so I just added pins in order to use that first one in prototyping. One advantage of adding the pins myself was I could mount it atop or beneath my main PCB. BTW, the support techs at ConnectOne are very sharp and well orgaized - all my questions were answered by the same tech so there was no loss of continuity. (Either they are well organized or they only have one overworked support tech.)

I know there are ways to push the time out to machines on a LAN but, as I've never had the need, I've never explored it. Search Bing (or Google?) using Time Synchronization Network (LAN) for details.