[conspire] CABAL (in-person + Jitsi Meet), Sat. Nov 13, 4pm - 12m

[Rick Moen]

Quoting Syeed Ali (syeedali at syeedali.com):

> > Saturday, Nov. 13, 4pm to midnight
> 
> For those of us online, they are west coast.
> 
> This calculator will help with time zones:
> 
> https://www.timeanddate.com/worldclock/converter.html?iso=20211114T000000&p1=234&p2=75&p3=64&p4=179

I stand gently reproved.  

Thanks, Syeed, I'll remember to include PST/PDT (and perhaps also the UTC
offset[1]) in future announcements.

BTW, you can find how to solve this problem using only GNU date(1) 
on balug.org/covid (shortened URL for a BALUG wiki page listing known
anglophone online LUG meetings).  Yr. humble servant wrote section
"#timezone_conversion" near page bottom, giving the recipe.

Basically:

TZ='[destination zone]' date -d 'TZ="[source zone]" YYYY-MM-DD HH:MM'
(where HH is in 24-hour notation).

The tricky bit is knowing the correct tzdata[2] specifier for a given
location, e.g., knowing that the correct specifier for a LUG in Arizona
is America/Phoenix.  For that reason, I've made sure correct TZ
specifiers are included for all LUGs on that page.


[1] The irony in this being that familiar incantations like "PST8PDT",
although valid for use by GNU date(1)'s lookup of tzdata database 
information, it is deprecated for reasons I used to know but cannot 
currently recall[3], which is why the wiki page states, instead, the
recommended TZ="America/Los_Angeles" for San Francisco Bay Area LUGs.

[2] https://en.wikipedia.org/wiki/Tz_database
https://www.iana.org/time-zones

[3] Er, it's something like "Those three-or-four letter tzdata
specifiers are neither standardised nor unique, e.g., BST doesn't just
stand for British Summer Time but also for Bangladesh Standard, Brazil
Standard Time, etc."
https://stackoverflow.com/questions/28548750/java-date-forcing-bst-timezone