How do people greet each other when in different time zones?

How do people greet each other in different time zones?

Do people greet each other with good Monday/Tuesday/...? They don't completely solve the problem [Don't use commas for series of just two.] but are better than good morning/afternoon/evening.

Thanks.

Good morning, Good afternoon, and Good evening are not better. They're bad. No native English speaker ever says "Good Tuesday."

If you're not sure whether it's morning, afternoon, or night where the person you're talking with is, just say "Hello."

NOTE: Capitalize days of the week. They're proper nouns.

We usually say 'Good evening to India, good afternoon to Germany, good morning to America' or equivalent, or 'good morning, good afternoon, good evening, whichever time it is where you are', but it is still everytime as a half- or quarter-joke; there is simply no standard way to handle it, as it is too new a need to have made it into standard language.
Of course, you can avoid the issue by saying 'hello, how you are all doing' or some other expression that doesn't refer to the time of day.

It is very rare that different locations have different weekdays, and I haven't ever heard any reference to the weekday in the greeting anyway. So 'Good Monday', etc. is a no-no.

"Good day" of all responses seems the most rational, as every day has morning, noon and night.