For those who don't know, the time difference between KHI and where I am located is 12 hours. Makes some things convenient.
During the work years, I often met with the teams in Malaysia. The time difference is 15 hours. It worked great. Late afternoon meetings for us would be 1800 for me, 0900 for them. And, being the good team they were and knowing I often started my day by 0530, they would meet with me at 2100 their time.
I really didn't like to do that too often. Not really fair to them. I had no issues with the 1800/0900 arrangement.
Now, the people in PRG; forget about it. At 1700 they were stampeding out the door for the nearby pubs. During the summer months, the time difference is 9 hours. So if I wanted an answer to something that day, if I didn't call or email them by 0730 latest my time, it would be the next morning before a response was received.