How do I greet someone in a different timezone when my morning is his evening? [duplicate]

I am in Nepal and my father is in America. When we talk with him it is our morning and his evening. Now how can I greet him and how can he greet me saying, where one would typically say 'good morning' or 'good evening'?

According to Etymonline good day is short for have a good day. It seems to deal with good morning and good night similarly. The phrasing goes back to the 14th century, so the problem of one person greeting another who happened to be in a remote time zone didn't come up.

Presently, if you are wishing someone a good day or a good morning, you are talking about what you are hoping for in their day or morning. It makes sense to conform your kindness to their experience.

Reference their time, not yours.

I don't believe there is a widely accepted answer to this question and it will mainly depend on what you two are comfortable with and/or what seems natural. The globalization of communication is a very recent development compared to the history of language.

My girlfriend is currently living on the other side of the world from me (a 13 hour difference). Since most of our conversations begin with one of us waking up, we usually just say "Good morning" since it seems very natural.

My suggestion is to avoid greetings that contain references to the time of day. "Hello", "Hi" or "Hi there" (etc.) are obvious candidates.