I’ve a RaspberryShake that serves up helicorder plots. By default, they’re in UTC. My brain isn’t yet wired to convert UTC to PDT (my local time). So I’ve modified my original shortcut to overlay PDT onto the left Y-axis. Someday I’ll make this a bit more sophisticated such as switching to standard time or be fully international.
As with the last Shortcut, this one assumes your Shake is resolved at rs.local