Converting Time Zones To Central Standard Time (CST) Topic is solved

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Everydaydiesel
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Converting Time Zones To Central Standard Time (CST)

Post by Everydaydiesel » Thu May 16, 2019 2:38 pm

I seem to be going in circles here and I would greatly appreciate any help I can get.


I have a date that comes in as "2019-05-16T09:30:00-04:00" as an example. (I wont know the timezone in advance)

In the example above it is -4:00 from UTC

2019-05-16 09:30:00 - 04:00

According to this chart https://savvytime.com/converter/utc-to-cst
adding 4 hours to 09:30:00 gives me 13:30 (or 8:30 AM converted to cst)


My question is how do I get the incoming date to the actual CST time.

Code: Select all

const char *time_details = "2019-05-16T09:30:00-04:00";
struct tm tm2;
strptime(time_details, "%Y-%m-%dT%H:%M:%S%z", &tm2);
time_t tmIncomingTime = mktime(&tm2);
struct tm * tmLocalTime = localtime(&tmIncomingTime);
time_t t3 = mktime(tmLocalTime);
The output of t3 is 9:30 which is not what I am expecting.

How can I get this converting the timezones with the correct time.

Thanks in advance.

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doublemax
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Re: Converting Time Zones To Central Standard Time (CST)

Post by doublemax » Thu May 16, 2019 3:06 pm

Code: Select all

    wxDateTime dt;
    dt.ParseFormat("2019-05-16T09:30:00-04:00", "%Y-%m-%dT%H:%M:%S%z");
    wxLogMessage( "Local: %s", dt.FormatISOCombined() );
    dt.MakeUTC();
    wxLogMessage( "UTC:   %s", dt.FormatISOCombined() );
Use the source, Luke!

Everydaydiesel
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Re: Converting Time Zones To Central Standard Time (CST)

Post by Everydaydiesel » Thu May 16, 2019 3:13 pm

Thank you!!!

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