time zone database open questions (update on Windsor)

Chris Walton Chris.Walton at telus.com
Tue Nov 9 04:03:20 UTC 2010

In reference to Mark Brader's comments on the use of Standard Time in Windsor, Ontario, Canada:
I don't have any official information to offer... but I did a quick Google search and came up some tidbits.
It would appear that Windsor may have kept its clocks in sync with Detroit for at least some of the 1960s, but by 1970 Windsor had its clocks synced with the rest of Ontario.
Since the cut off rule for the TZ database is 1970 we likely don't need a special time zone file for Windsor.

This article was posted today!
Look at Comment #1 (half way through the page); it includes the following text:
   ' I recall listening to Windsor radio in the 1960s (CKLW),
     and Windsor kept on standard time all summer because
     Detroit did. '

Note that posting from Radio Fish Heads; referring to radio broadcasts from CKLW in 1970.  It includes this text:
    ' ... CKLW with Hal Martin; its 9 o'clock in Detroit,
      10 o'clock in Windsor ( or soemthing like that ), and the
      Motown music cooked my car speaker....... '

Supposedly you can pay $15.00 to download a CKLW recording from 1971.
I decided that I did not want to hear it that badly!
But note the comment in the first paragraph of text; it reads:
   ' Since Detroit was one of the few major cities that
     refused to go along with the Daylight Savings Time
     scheme, the CKLW jocks frequently had to announce
     the time twice. ' 

Note the caption under the Tom Jones Ticket; it reads:
   ' A ticket to see Tom Jones from 1972. Note
     the ticket states "Detroit Time", as back then,
     Daylight Savings Time wasn't always consistent,
     so there could be an hour difference between
     Windsor and Detroit. '

From: Arthur David Olson [olsona at elsie.nci.nih.gov]
Sent: Thursday, November 04, 2010 2:49 PM
To: tz at lecserver.nci.nih.gov
Subject: time zone database open questions

Here are the open time zone database questions I know of. Are the others?

1. Did all of Mexico's Baja California Norte use United States DST rules in
2010, or did only border areas use U.S. DST? What of other Mexican states on
the U.S. border?

2. How was DST handled in the West Bank and in Gaza in 2010? How was it
handled in previous years?

3. What's the accurate history of the change to use of Shanghai/Beijing time
in China?

4. Is there an acceptable way of handling present-day dual timekeeping in
Xinjiang, China without either losing track of past practices?

5. Did Windsor and other parts of Ontario, Canada use different DST rules
in the past? (See Mark Brader's communication at the end of this message.)


# From Mark Brader (2010-03-06):
# ...
# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
# right corner of page 1, it says that Toronto will return to standard
# time at 2 am Sunday morning (which agrees with the database), and that:
#     The one-hour setback will go into effect throughout most of Ontario,
#     except in areas like Windsor which remains on standard time all year.
# Windsor is, of course, a lot larger than Nipigon.
# I only came across this incidentally.  I don't know if Windsor began
# observing DST when Detroit did, or in 1974, or on some other date.
# By the way, the article continues by noting that:
#     Some cities in the United States have pushed the deadline back
#     three weeks and will change over from daylight saving in October.

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