Well, I've just discovered that although "Australia/Melbourne" is rejected as a timezone, "Australia/NSW" seems OK. Note that "Australia/Victoria" (Victoria being the Australian state of which Melbourne is the capital) is also rejected, as is "Australia/Sydney". I have no idea why this should be so, and why Perl/WeBWorK should allow some timezones and reject others. I also tried leaving the timezone field empty in site.conf and localOverrides.conf, but that again led to errors.
WeBWorK Main Forum
Error that legitimate timezone is "not legal"
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