On Thu, Jul 23, 2020 at 04:45:43PM +1000, Keith bainbridge wrote: > Probably right, but I wasn't sure if UTC adjusted to daylight saving time, > and got a couple of conflicting versions when I searched.
It doesn't. If your local time zone does DST, you will notice that your offset from UTC changes when your clock changes. For me (America/New_York aka US/Eastern aka EST5EDT), the current offset from UTC is 4 hours. unicorn:~$ date; date -u Thu Jul 23 07:37:55 EDT 2020 Thu Jul 23 11:37:55 UTC 2020 When my clock goes back to normal in the late fall, it will be 5 hours. Regardless of what the Internet tells you about UTC, though, you don't have to *know* how it actually works. You just have to know enough to run "date -u" to get your current offset, and then apply that offset to your appointment time. Assuming of course that your appointment time is on the same side of a DST break as you are now.