Local Option 1945-1966 for D.S.T. USA

[staragewiz]

According the "The History of Time" (Wikipedia) there was a Local Time Option
for D.S.T from 1945-1966.. In other words various locales and cities used S.T.
while the rest of the country was on D.S.T After 1966 D.S.T. became uniform
throughout the U.S. I don't think this L.T.O. is included in SF or Janus.TZ calculations.
Doris Chase Doane's time changes book also doesn't adjust for locality variations
during the years 1945 to 1966. So, many charts calculated during this period could be off by a hour?
Wrote Janus about it, and they had no clue, and said they would look into it.
SF calc's matches Janus's. Check out "The History of Time" for more details.
Anyone know anything about this D.S.T discrepancy?

[Jim Eshelman]

I thought - but I could be wrong - that this was taken into consideration when Tom Shanks compiled The American Atlas (which is what's used in Solar Fire). Do you have a couple of specific examples we could check?

I can't find the Wikipedia article referencing this. Instead, I find:
https://en.wikipedia.org/wiki/Standard_ ... th_America

Standard time was not enacted into US law until the 1918 Standard Time Act established standard time in time zones; the law also instituted daylight saving time (DST). The daylight saving time portion of the law was repealed in 1919 over a presidential veto, but was re-established nationally during World War II.[11][12] In 2007 the US enacted a federal law formalising the use of Coordinated Universal Time as the basis of standard time, and the role of the Secretary of Commerce (effectively, the National Institute of Standards and Technology) and the Secretary of the Navy (effectively, the U.S. Naval Observatory) in interpreting standard time.

[staragewiz]

Try this link and then scroll down to Local Time Option
https://en.wikipedia.org/wiki/History_o ... ted_States

[staragewiz]

After researching various cities in PA for DST in 1946....A number indeed did come up as EST, while
others listed as DST.

Please take down previous posts on this subject as not to cause anymore TZ confusion.

[Jim Eshelman]

Are you saying that you confirmed that our standard time zone references are accurate? I wanted to check exactly that against what was in the Wikipedia article. if you're saying that you now think we can trust this (because the time researchers already incorporated this strange data), then yes, I'll take this down.

Thanks for jumping on this, though. It could have been a mess!