setTimeZone doesn't seem to be working correctly

[buelowp]

This is the built on the latest Arduino IDE. I've got the following which doesn't seem to be working correctly.

    DateTime.setServer("pool.ntp.org");
    
    DateTime.begin();

    if (!DateTime.isTimeValid()) {
        Serial.println("Failed to get time from server.");
    }
    else {
        DateTime.setTimeZone(currentTimeZone());
        Serial.print("Setting timezone to ");
        Serial.println(currentTimeZone());
    }

I print in loop() with the following

void loop() 
{
    Serial.println(DateTime.toString().c_str());
    Serial.println(DateTime.toUTCString());
    delay(5000);
}

Where currentTimeZone is a function I have to that returns an integer timezone. Time must be set first, it needs to know the month and year. When I call DateTime.setTimeZone(), GMT is changed and in the wrong direction.

IP address: 172.24.1.56
Setting timezone to -5
2020-04-15 15:19:05
Wed, 15 Apr 2020 20:19:05 GMT

Local time when this printed was 10:15:05 AM. If I don't set the timezone, both are the same

IP address: 172.24.1.56
Setting timezone to -5
2020-04-15 15:24:18
Wed, 15 Apr 2020 15:24:18 GMT

Local time when this was printed was 10:24:18

Finally, if I pass it a positive timezone (5 instead of -5)

IP address: 172.24.1.56
Setting timezone to 5
2020-04-15 15:25:55
Wed, 15 Apr 2020 10:25:55 GMT

Local time when this was printed was 10:25:55

I'm using version 0.2.0 in the Arduino IDE.

*** Edit
I added a true/false check on the setTimeZone() function, and it returns true.

[rin67630]

Same thing here.
I have set the time zone to -1 (Paris) I get the asian time, 6 hours ahead...
The settings of the time zone seem to be completely ignored.
void setupDateTime() { // DateTime.begin(15 * 1000); DateTime.setServer("nl.pool.ntp.org"); DateTime.setTimeZone(-1); DateTime.begin(); if (!DateTime.isTimeValid()) { Serial.println("Failed to get time from server."); } }

Hint:
On an ESP32 the time zone is working correctly, The reported time zone from p.getTimeZone() is always correctly reported as I have set it.
But on an ESP8266 workaround with adding seconds (computed from the time zone settings) is failing: the time given ist just always the asian one.

[buelowp]

Mine was failing on an ESP32 though, so it's not processor specific.

[fusionstream]

Same issue on an ESP8266 on a Wemos D1 Mini Pro. As a workaround, I just inverted the timezone. For +5, I set it to -5

[xfdr0805]

me too
DateTime.setServer(ntpServer);
DateTime.begin(15 * 1000);

DateTime.setTimeZone(8);//not work

DateTime.begin();

String str = " >>NTP对时成功," + DateTime.toString();
draw_chinese_font(0, 80, str.c_str(), ILI9341_RED);
if (!DateTime.isTimeValid()) {
Serial.println("Failed to get time from server.");
}

time_t t = DateTime.now() + 8 * 3600;

DateTime.setTime(t);
setTime(t);

[xfdr0805]

sloved:
esp8266/Arduino#7319

[mcxiaoke]

ESP8266 does not support timezone, it just add timeZone * 3600 seconds to original timestamp. maybe esp8266/Arduino#7319 fixed this.

[mcxiaoke]

fixed