Walt Farrell wrote:

>The problem with the transition from daylight-saving time to standard time, 
>Elardus, is that the hour from 1 a.m. to 2 a.m. (0100 to 0200) happens twice: 
>once while you're on daylight saving time, and once when you've switched back 
>to standard time. (Assuming I got the times, and the direction correct. I 
>think I was wrong about that in my prior note.) So I don't think a 
>table-driven approach can work.

Thanks for kindly reply to my bad ( ????  :-D ) suggestion. I forgot about 
those two incidents of switching.

>You can infer whether you've made the transition if you examine the records 
>carefully, and note the times you see in them, and detect the change by 
>noticing overlapping records (one record that says, e.g., 0159 followed by a 
>record that says 0101. But if you don't see that kind of change you can't be 
>sure whether the first set of 0100-0200 was daylight saving time or not. And 
>that only works for the SMF record date/time, not for the reader start 
>date/time fields.

Very interesting about that overlapping thing. Thanks very much! :-D

I wonder if John McKown could consider your good reply? 

Groete / Greetings
Elardus Engelbrecht

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html

Reply via email to