Time Zones are based on lines of Longitude - with detours to avoid land.
Because time is based on the Earth's rotation which is from west to east, so that the Sun appears to move from east to west. Latitude lines run around the Earth east and west, so the sun doesn't cross them as it does longitude lines.
Time Zones are..............................Longitude
There is no relation. Every latitude passes through every time zone.
It's the lines of longitude which are used to define time zones, not lattitude.
It is closely related to the Greenwich meridian.
Because time is based on the Earth's rotation which is from west to east, so that the Sun appears to move from east to west. Latitude lines run around the Earth east and west, so the sun doesn't cross them as it does longitude lines.
Time Zones are..............................Longitude
Time zones are calculated using lines of latitude.
time zones
There is no relation. Every latitude passes through every time zone.
It's the lines of longitude which are used to define time zones, not lattitude.
It is closely related to the Greenwich meridian.
Establishing time zones made it possible for everyone in the country to experience the sun being at the highest point in the sky and crossing the meridian at noon.
Your question needs clarification. Adjacent time zones are always one hour different. Are you asking how the border between time zones is established? Are you asking why do we have time zones?
Greenwich, London is at Longitude 0 and latitude N51.48 degrees. Greenwich is the universal reference point for time zones called Greenwich Mean Time or more commonly GMT. Most time zones are based on this reference as a number of hours and half-hours "ahead of GMT" or "behind GMT".
There are 24 hours in a day, so the creators of the time zones are reasoning that the most accurate they need to be is down to the hour. So if we look at the position of the sun every hour for one day, then there are 24 different positions, hence, 24 different times and time zones.
rom east to west they are Atlantic Standard Time (AST), Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), Pacific Standard Time (PST), Alaskan Standard Time (AKST), Hawaii-Aleutian Standard Time (HST), Samoa standard time (UTC-11) and Chamorro Standard Time (UTC+10).