Daylight Saving Time, as well as the current time in the local time zone, can be found via the World Time API.
I can't believe this has not been asked before, but I'm not able to find it on the internet.
The zone names start with "Etc/..." and are hosted by IANA.The private non-official repository is labelled as experimental but can be considered as preparing repository for TZDB.
You will find a file there.This file contains the zone identifiers mentioned above.The answer is:
I think it is a good idea to ask the maintainer of the TZDB-repository about the motivation of such naming.