Daylight Saving in the news

"Trump vows to end 'very costly' daylight saving time" (While Mexico may not pay for it, Mexico and Canada may follow suit.) https://www.bbc.com/news/articles/cn9gjvgv4neo @dashdashado

A question: to update for a U.S. DST change, what are best estimates for C, H, and D in the electronics cost formula C companies * H hours of staff time per company * D dollars per staff hour (H and D values based on past changes elsewhere are most welcome.) @dashdashado On Sat, Dec 14, 2024, 5:00 PM Arthur Olson <arthurdavidolson@gmail.com> wrote:
"Trump vows to end 'very costly' daylight saving time"
(While Mexico may not pay for it, Mexico and Canada may follow suit.)
https://www.bbc.com/news/articles/cn9gjvgv4neo
@dashdashado

The US DoT was meant to report to Congress by 2020-09 but did not and there seems to be no online trace of the report - perhaps because it made no one happy? Reports suggest that most impacts slightly increase net costs over any benefits; and health effects are personally devastating but noise relative to the normal volume of incidents, such as heart attacks and strokes, and industrial and traffic injuries. Changing time offsets or business and education schedules to align better with solar times may allow a more positive outcome. DST does increase the amount people drive to golf courses, sporting events, and to attend barbeques, which probably have negative health impacts, depending on activities upon reaching the 19th hole or club house ;^> One lost opportunity cost estimate is now $2G/year - $1G/change - just from everyone spending 10 minutes changing clocks. And I saw one estimate that markets lose $31G because of sleepy traders. [G rather than B because that could look like digit 8 in some fonts!] Younger householders don't do this as they don't use clocks, watches, or devices that don't update themselves - except for cooking devices that still have clocks and not just timers, and SatNav which have only time offset selections not zone rules, nor geographic lookup a la tzselect, and just DST/Summer Time offset in effect or not. So scale that estimate up another three orders of magnitude and ball park $2T to cancel DST in 47 states, plus add $1T for other impacts including CA, MX, and international schedules. -- Take care. Thanks, Brian Inglis Calgary, Alberta, Canada La perfection est atteinte Perfection is achieved non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut -- Antoine de Saint-Exupéry On 2024-12-14 18:45, Arthur Olson via tz wrote:
A question: to update for a U.S. DST change, what are best estimates for C, H, and D in the electronics cost formula
C companies * H hours of staff time per company * D dollars per staff hour (H and D values based on past changes elsewhere are most welcome.)
On Sat, Dec 14, 2024, 5:00 PM Arthur Olson wrote:
"Trump vows to end 'very costly' daylight saving time"
(While Mexico may not pay for it, Mexico and Canada may follow suit.)
https://www.bbc.com/news/articles/cn9gjvgv4neo <https://www.bbc.com/news/ articles/cn9gjvgv4neo>

Hi Arthur On 15.12.2024 02:45, Arthur Olson via tz wrote:
A question: to update for a U.S. DST change, what are best estimates for C, H, and D in the electronics cost formula
C companies * H hours of staff time per company * D dollars per staff hour (H and D values based on past changes elsewhere are most welcome.)
So long as enough notice is given, H would approach 0 for the (very big) company I work at, because thanks in no small part to you and this group, it's a no-code change and we already have processes in place to update the TZ database. But that notice is key, because different organizations take varying amounts of time to deploy updates (much of our stuff is not end-user facing). The one dev area I would want eyes on would be calendaring integration (Apple, Microsoft, Google). Eliot

On 2024-12-15 02:30, Eliot Lear via tz wrote:
Hi Arthur
On 15.12.2024 02:45, Arthur Olson via tz wrote:
A question: to update for a U.S. DST change, what are best estimates for C, H, and D in the electronics cost formula
C companies * H hours of staff time per company * D dollars per staff hour (H and D values based on past changes elsewhere are most welcome.)
So long as enough notice is given, H would approach 0 for the (very big) company I work at, because thanks in no small part to you and this group, it's a no-code change and we already have processes in place to update the TZ database. But that notice is key, because different organizations take varying amounts of time to deploy updates (much of our stuff is not end-user facing). The one dev area I would want eyes on would be calendaring integration (Apple, Microsoft, Google).
All the majors and many others appear to use CLDR as their source of truth in many areas: https://cldr.unicode.org/#who-uses-cldr -- Take care. Thanks, Brian Inglis Calgary, Alberta, Canada La perfection est atteinte Perfection is achieved non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut -- Antoine de Saint-Exupéry
participants (3)
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Arthur Olson
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brian.inglis@systematicsw.ab.ca
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Eliot Lear