地球上出現三個地方三個不同日子 Consider the time 1000 UTC on Sunday. In American Samoa which follows UTC-11 time zone, the time is 2300 on Saturday. At the same moment, in Kiritimati (or Christmas Island, part of the Republic of Kiribati) - which follows UTC+14 - the time is 0000 on Monday i.e. Midnight. For the next hour (1000-1100 UTC), three different dates will exist in these 3 regions. After 1100 UTC, American Samoa will also enter Sunday. Between 1100-1159 UTC, the time zone UTC-12 will still be observing Saturday, however, there are no inhabitants in the UTC-12 time zone (uninhabited Maritime time zone). So yes, 3 calendars days / dates can exist at the same time on Earth, but only between these specific times.