Wednesday, November 24, 2010

The existential meaning of Standard Time

NHPR is having a fine time discussing a book about time. As you may or may not know, once upon a time each town and city kept its own time, 12 o'clock was when the sun crossed the zenith. Since the moment of local noon changes from place to place, the time would be different between Boston and Salem and Lexington and Hartford and every place.
Railroads needed time tables, both to let passengers and shippers know when to be at the station, but also to prevent head on collisions on single track lines. Creating an accurate time table is difficult enough (how many minutes to travel from East Overshoe to West Gumstump) but to then compute a time correction to account for the fact that East Overshoe is a few minutes ahead of West Gumstump, is just too much to keep straight and get right. Plus, what keeps the train on time is the train crew looking at their pocket watches, all set to railroad headquarters time. Train crew needs a time table with uniform times, the time indicated on their watches.
And so, the railroads met and carved the US up into the four time zones we still use. Then the station clocks were set to railroad time, and timetables printed in railroad time and that was that. Pretty soon passengers and shippers (nearly everyone) found it convenient to set their clocks to match the railroad clocks.
All this colorful history was too much for NHPR to cover. They bloviated about the deep inner meaning of standard time, the existential meaning of local time, the blessedness of having no time at all and other poetic subjects.

No comments: