Date line. The hypothetical line on the surface of
the earth fixed by international or general agreement as a boundary on
one side of which the same day shall have a different name and date in
the calendar from its name and date on the other side.
&fist; Speaking generally, the date line coincides with the
meridian 180° from Greenwich. It deflects between north latitudes
80° and 45°, so that all Asia lies to the west, all North
America, including the Aleutian Islands, to the east of the line; and
between south latitudes 12° and 56°, so that Chatham Island
and the Tonga group lie to the west of it. A vessel crossing this line
to the westward sets the date forward by one day, as from Sunday to
Monday. A vessel crossing the line to the eastward sets the date back
by one day, as from Monday to Sunday. Hawaii has the same day name as
San Francisco; Manila, the same day name as Australia, and this is one
day later than the day of Hawaii. Thus when it is Monday May 1st at
San Francisco it is Tuesday may 2d at Manila.
Date line. The hypothetical line on the surface of
the earth fixed by international or general agreement as a boundary on
one side of which the same day shall have a different name and date in
the calendar from its name and date on the other side.
&fist; Speaking generally, the date line coincides with the
meridian 180° from Greenwich. It deflects between north latitudes
80° and 45°, so that all Asia lies to the west, all North
America, including the Aleutian Islands, to the east of the line; and
between south latitudes 12° and 56°, so that Chatham Island
and the Tonga group lie to the west of it. A vessel crossing this line
to the westward sets the date forward by one day, as from Sunday to
Monday. A vessel crossing the line to the eastward sets the date back
by one day, as from Monday to Sunday. Hawaii has the same day name as
San Francisco; Manila, the same day name as Australia, and this is one
day later than the day of Hawaii. Thus when it is Monday May 1st at
San Francisco it is Tuesday may 2d at Manila.
