Daylight or standard time

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bwolfsohn
Posts: 651
Joined: Thu Jan 28, 2010 7:07 am
Location: Alachua, Florida USA
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Daylight or standard time

#1 Post by bwolfsohn »

I'm drawing a blank here...

when displaying the time, i'd like to also display whether it's daylight standard time or daylight savings time.

there's a windows function that will return that, but i have never done wrappers for that...

https://msdn.microsoft.com/en-us/librar ... 2147217396

DWORD WINAPI GetDynamicTimeZoneInformation(
_Out_ PDYNAMIC_TIME_ZONE_INFORMATION pTimeZoneInformation
);

if it returns a 2,. it's daylight savings time, otherwise it's standard time.

does anyone have a function that handles this ?? or, can you tell me how to call it ??
Brian Wolfsohn
Retired and traveling around the country to music festivals in my RV.
breadmanbrian@bsky.social
http://www.breadmanrises.com
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Auge_Ohr
Posts: 1439
Joined: Wed Feb 24, 2010 3:44 pm

Re: Daylight or standard time

#2 Post by Auge_Ohr »

bwolfsohn wrote:when displaying the time, i'd like to also display whether it's daylight standard time or daylight savings time.

there's a windows function that will return that, but i have never done wrappers for that...

https://msdn.microsoft.com/en-us/librar ... 2147217396

DWORD WINAPI GetDynamicTimeZoneInformation(
_Out_ PDYNAMIC_TIME_ZONE_INFORMATION pTimeZoneInformation
);

if it returns a 2,. it's daylight savings time, otherwise it's standard time.
it is a Structure, read here https://msdn.microsoft.com/en-us/librar ... 85%29.aspx
bwolfsohn wrote:does anyone have a function that handles this ?? or, can you tell me how to call it ??
as i remember StandardDate/DaylightDate are SYSTEMTIME Structure
(https://msdn.microsoft.com/en-us/librar ... 85%29.aspx)
it does contain Start Day / End Day of Daylightsaving.

if you just need Day, not Time Bias, you can calculate it with this
Daylight.ZIP
(409 Bytes) Downloaded 821 times
greetings by OHR
Jimmy

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