Timezone Conversion is giving one hour more in PHP

Question

I have this following script:

$data = array(
  'fromTimezone'          => 'Asia/Kolkata',
  'toTimezone'            => 'America/New_York',
  'dateTime'              => '2020-02-06 08:34:11',
  'dateTimeFormat'        => 'Y-m-d H:i:s'
);

$fromTimezone           = $data['fromTimezone'];
$toTimezone             = $data['toTimezone'];
$dateTime               = $data['dateTime'];
$dateTimeFormat         = $data['dateTimeFormat'];


$fromZoneDateTime    = new DateTime($dateTime, new DateTimeZone($fromTimezone));

// synchronizing with the to-Timezone
$fromZoneDateTime->setTimezone(new DateTimeZone($toTimezone));

$returnDateTime    = date($dateTimeFormat, strtotime($fromZoneDateTime->format('Y-m-d H:i:s')));
echo $returnDateTime;

This is giving me 2020-02-05 22:04:11

But when I am checking the time in Real Time Application for Timezone conversion. like The Time Zone Converter, I am getting data as 2020-02-05 23:04:11.

Why is this mismatch? How can I overcome this?

Daylight savings time in the US added 1 hour starting 03-08 so there is an added hour between your check of 02-05 and today 04-21. — AbraCadaver, Apr 21 '20 at 15:16

score 1 · Accepted Answer · answered Apr 21 '20 at 19:51

The site you referenced is showing you the difference between your local time zone (presumably India) and the time in New York for the current date.

There are other sites that you can use to validate your assumptions, such as timeanddate.com, which shows the correct results for the date in question, which align to your code output.

As for why, understand that while India is fixed to UTC+05:30 (IST), New York alternates between UTC-05:00 (EST) and UTC-04:00 (EDT). For more on this, please read the timezone tag wiki, especially the section "Time Zone != Offset". You might also want to review the DST tag wiki.

Ajanyan Pradeep · Answer 2 · 2020-04-21T15:16:38.263

0

I think that is because of the day light savings.

Please refer PHP daylight saving time detection

edited Apr 21 '20 at 15:16

answered Apr 21 '20 at 15:11

Ajanyan Pradeep

1,097
1
16
26

How to overcome this? – Saswat Apr 21 '20 at 15:13
1

The time is the time what do you want to overcome? – AbraCadaver Apr 21 '20 at 15:19
@Saswat - There's nothing to overcome. As AbraCadaver points out - the time conversion is correct. – Matt Johnson-Pint Apr 21 '20 at 19:51

Timezone Conversion is giving one hour more in PHP

2 Answers2