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Time zones, which divide the surface of the globe into 15-degree intervals and determine what time it is in a particular place, are a fairly new invention. Until the early 20th century, countries and even individual administrative units of countries set their own time, focusing exclusively on the sun and their own convenience. Each city had its own time. Which led to a lot of problems in transport and trade. #UTC #timezones Time Codes: 00:00 - Introduction: Daylight Saving Time 01:39 - The Problem of Marine Navigation 02:52 - Solving the Longitude Problem and Greenwich Time 08:17 - A Clock Without a Minute Hand 09:51 - Railways and Time Standardization in the UK 15:56 - The US and Canada Introduce Their First Time Zones 20:26 - Russia Manages Without Time Zones 21:51 - The Meridian Conference and the Prime Meridian 24:42 - The GMT/UTC System: How to Use the International Time Zone System 27:52 - Playing with Time Primary sources: https://www.bts.gov/geospatial/time-z... • What Time Zones are the Poles In? • The longitude problem: history's dead... • A History of Time Zones Channel support with exclusive materials for subscribers: Boosty: https://boosty.to/elevated Patreon: / julia_bolchakova My social networks: Instagram: / perpetual_foreigner Facebook (please follow): / julia.bolchakova All materials in these videos are used for educational purposes and fall within the guidelines of fair use. No copyright infringement intended. If you are, or represent, the copyright owner of materials used in this video, and feel that they were used inappropriately, please, contact me and I'll do all necessary changes.