ajavööndides
Ajavööndides, often translated as time zones, are defined geographical regions that observe a uniform standard time for legal, commercial, and social purposes. The Earth is divided into twenty-four main time zones, each roughly fifteen degrees of longitude wide, corresponding to one hour of difference from Coordinated Universal Time (UTC).
The concept of time zones arose in the late 19th century with the advent of railways, which
Time zone boundaries are not strictly determined by longitude but often follow political or geographical borders