Possible DST Discrepancies for Manitoba, Canada
Across the board, I've come across a possible discrepancy that I can't seem to let go off. The years 1957 - 1963 in the data base for Manitoba. Winnipeg and Selkirk both switch for those years appropriately, but none of the other Manitoba towns I've tried have. My birth date is June 1957 in one of the town and I cannot find out if DST was province wide for that year. I believe there were 2 years in this time frame that Winnipeg did not subscribe to DST (1960-61). Would very much appreciate if you have the resources to look into this? If the rest of the towns in Manitoba followed Winnipeg/Selkirk, then there is a large error margin happening. Regards, Rena Bergman
Rena B wrote:
The years 1957 - 1963 in the data base for Manitoba. Winnipeg and Selkirk both switch for those years appropriately, but none of the other Manitoba towns I've tried have.
I'm not sure which database you're talking about; the tz database has just one entry for Manitoba, namely America/Winnipeg. As the file 'northamerica' says, America/Winnipeg's pre-1970 data is mostly taken from Shanks & Pottenger, which says that parts of Manitoba used different rules before 1970. The tzdata cutoff is 1970, though, so I ignored the other Manitoba locations. For the ignored data you might try consulting Shanks & Pottenger directly, though I should warn you their data's reliability is spotty. https://github.com/eggert/tz/blob/master/northamerica
Have you considered contacting the Royal Astronomical Society of Canada? http://rasc.ca/ There is a center (ie a local club) in Winnipeg and if anyone might know about Manitoba you should be able to find someone who knows about that there, or know who you should talk to. http://winnipeg.rasc.ca/ (their annual Observer's Handbook publication (starting publication in the early 1900's) tracks the timezone boundary in Canada. I don't know when timezone tracking started in the OH but if you find the series (say in public or university library) the maps may give a indication as to what timezone were observed in Manitoba in 1960-1961.) Astronomers (even amateur ones) care about time a lot so that would be a good place to start. On 06/12/2015 1:34 PM, Rena B wrote:
Across the board, I've come across a possible discrepancy that I can't seem to let go off.
The years 1957 - 1963 in the data base for Manitoba. Winnipeg and Selkirk both switch for those years appropriately, but none of the other Manitoba towns I've tried have. My birth date is June 1957 in one of the town and I cannot find out if DST was province wide for that year.
I believe there were 2 years in this time frame that Winnipeg did not subscribe to DST (1960-61).
Would very much appreciate if you have the resources to look into this? If the rest of the towns in Manitoba followed Winnipeg/Selkirk, then there is a large error margin happening.
Regards, Rena Bergman
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Rena B