This exercise was a lot more tedious than I imagined. Again, the rules applied in general terms only. There were also a handful of odd-numbered highways that crossed time zone boundaries too and muddied the construct a bit. Even-numbered Interstates run roughly west to east across the nation with the 2-digit numbering increasing from south to north. I didn’t reverse the order just to be obstinate. That was also the reason why Interstate numbers on the spreadsheet and the lists below were ordered from large to small (I-94 to I-8). The spreadsheet layout mimics the geographic footprint of the United States in rough terms, for example I positioned Idaho at the top-left (northwest) and Florida at the bottom-right (southeast). Others may prefer the even more detailed Google spreadsheet with links that I prepared. It’s not very useful in its present scaled down version that is included for illustrative purposes. Readers will want to open this map in another tab or window. I even collected the lat/long coordinates so travelers (OK, maybe just me…) could drop the waypoints into their GPS receivers and know exactly where time changes happen well in advance. However some of us like to be hyper-prepared before embarking on a journey. Yes, I understand that mobile phones and other networked devices grab time changes automatically without human intervention from nearby cell towers as someone drives merrily down the highway. Hopefully others will find this compact reference useful too. I didn’t see it so I decided to create my own.
Maybe there’s one out there hidden away in a lonely corner of the Intertubes.
I’m going to do that myself soon on my upcoming trip and I couldn’t find a comprehensive resource either. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution.I’ve noticed a lot of search engine queries lately seeking additional information about points along US Interstate Highways where travelers cross from one time zone into another. Imagination is more important than knowledge. The International Date Line (IDL), located 180 degrees longitude, delineates from one day to the next time moves incrementally as one travels west of the IDL. The point of departure at which Synchronized Universal Time (UTC) begins is the Prime Meridian (zero longitude).
Since several nations have half hour time zones, the planet has more than twenty-four times that. The planet is divided longitudinally into time zones, with approximately 15 degrees apart from each hour difference. Why are there 24 time zones?Ī time zone is a place or area where the same standard time is observed. Time zones tend to follow the boundaries of countries and their subdivisions instead of strictly following longitude because it is convenient for areas in close commercial or other communication to keep the same time. If DST is in use, then specific rules define the point at which the offset changes and the amount by which it changes.Ī time zone is a region of the globe that observes a uniform standard time for legal, commercial and social purposes. Typically, regions closer to the equator do not use DST. The offset might vary throughout the year, if daylight savings time (DST) is used, or might be the same all year long. Shows the world time and date for cities in all time zones.Ī time zone represents an offset applied to Greenwich Mean Time (GMT) to obtain local time.
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