Hello how may I help you? can you explain how time zones work? No, I cannot explain how time zones work. I am only programmed to calculate the different time zones. May I calculate a time zone for you? Okay. I guess that means you can't explain how NYC and Beijing live in different days huh? No, I'm sorry. I cannot explain how NYC and Beiging live in different days. How many hours is Beijing ahead of NYC anyway? Beijing is 25 hours ahead of NYC. Wow;. I guess china know what is going to happen today before NYC even gets out of bed in the morning You are correct. Do you have any other questions? No. Thanks for the info You are very welcome. Anytime!