This can be answered by geographical knowledge.
London 12, Beijing at 20: 00, Tokyo at 2 1, Toronto at 8: 00 and new york at 7: 00.
At 7 o'clock in Beijing, 8 o'clock in Tokyo, 23 o'clock in London, Toronto 19, new york 18(23, 19, 18 are all days ago).
Note that+is earlier than London time, it can be called East X District, for example, Beijing is in East 8 District, but-it is later, it can be called West X District, for example, new york is East 5 District.
The landlord also needs to know that China spans four time zones, but it is unified as Beijing time, that is, Dongba District, so when the sun rises on the Wusuli River, people on the Pamirs are still sleeping, so you will find that the news in some places is particularly late.
I wish the landlord study and progress!