Previous/Next day indicator

[scaredyfish]

For example at https://internet-ti.me/@665, New Zealand is in the following day, so Monday@665 is 02:57 Tuesday in New Zealand. It would be handy to have an indicator if a time zone is in a different day than CET - maybe a ▶ if you're a day ahead, and ◀ if you're a day behind.

[ticky]

This is a good idea, yeah! I do want to address this along with the ability to link to a concrete moment in time (#14), which would both make it more useful for sharing times for events which may be months or years away and subject to DST changes in between. Thanks for the feedback! :)