[tz] [PATCH] * northamerica: Add note re Chicago time before 1883.

Paul Eggert eggert at cs.ucla.edu
Mon Jan 8 05:01:52 UTC 2018


---
 northamerica | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/northamerica b/northamerica
index 505300a..a014126 100644
--- a/northamerica
+++ b/northamerica
@@ -348,6 +348,18 @@ Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58
 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
 # western Tennessee, most of Texas, Wisconsin
 
+# From Paul Eggert (2018-01-07):
+# In 1869 the Chicago Astronomical Society contracted with the city to keep
+# time.  Though delayed by the Great Fire, by 1880 a wire ran from the
+# Dearborn Observatory (on the University of Chicago campus) to City Hall,
+# which then sent signals to police and fire stations.  However, railroads got
+# their time signals from the Allegheny Observatory, the Madison Observatory,
+# the Ann Arbor Observatory, etc., so their clocks did not agree with each
+# other or with the city's official time.  The confusion took some years to
+# clear up.  See:
+# Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04.
+# http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/
+
 # From Larry M. Smith (2006-04-26) re Wisconsin:
 # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf
 # is currently enforced at the 01:00 time of change.  Because the local
-- 
2.7.4



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