The digital wall clock devices are completely configurable for various timezones and daylight saving settings.
The digital wall clock s are configurable from a telnet session and accept simple commands to modify timezone and daylight saving time settings.
Timezones are configured by supplying an offset from GMT time. For example, 'timezone -4' will set the timezone to EDT (Eastern Daylight Time). 'timezone +1' will configure timezones for CET or Central European Time.
Daylight saving can be configured using 'dst -us' for US daylight saving or 'dst -eu' for European Union daylight saving.
Alternatively, daylight saving can be specified manually as a start and end date and an offset.