2018-6-19 US waiting time

Today I have had an appointment for TV connecition. This is an american time. Setting up time between 8am to 12pm. It won't be never setting up exact time in Japan, but here is in US, so we need tolarate it. They have not colled yet, means I just have to wait them call me little ahead of arriving or just their shoing up. I have lived in US over 40 years, but still can't accept this lasy timing.