busdays function not return correct date

2024 11 8
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更新时间：2024 11 8
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Ran in:
Hi:
I'm trying to query the bus date list from given period, but I notice it returns different result by given the same date period, just at different time.
is there any mistake with my operation?
sample code is shown below:
load date_1
load date_2
load date_3
load date_4
busdays(date_1,date_2)
ans = 9x1 datetime array
28-Oct-2024 09:30:00 29-Oct-2024 09:30:00 30-Oct-2024 09:30:00 31-Oct-2024 09:30:00 01-Nov-2024 09:30:00 04-Nov-2024 09:30:00 05-Nov-2024 09:30:00 06-Nov-2024 09:30:00 07-Nov-2024 09:30:00
busdays(date_3,date_4)
ans = 8x1 datetime array
2024-10-28 10:30:00 2024-10-29 10:30:00 2024-10-30 10:30:00 2024-10-31 10:30:00 2024-11-01 10:30:00 2024-11-04 10:30:00 2024-11-05 10:30:00 2024-11-06 10:30:00
Thanks!
Yu

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Walter Roberson
Walter Roberson 2024-11-8

0 个投票

date_1 and date_2 both happen to have times of 09:30
date_3 has a time of 10:30. date_4 has a time of 9:30
The internal logic is
first_date : 1 : last_date
and then filter down to the business dates.
When the start time is 10:30 the generated times will all be 10:30 .
Note that date_4 itself will be excluded, since it's 9:30 time is after the 10:30 time of the starting time.

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Yu Li
Yu Li 2024-11-8
编辑：Yu Li 2024-11-8
this is really interesting, hmmmm.
steps are below shows how the difference is made:
load date_4
date_4
date_4-days(10)
the time difference between date_4-days(10) to date_4 is indeed 24*10 hours, the time difference is caused by transition from summer time to winter time recently in USA...
Walter Roberson
Walter Roberson 2024-11-8
I did not think of looking at time zones!

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