Columbus, Ohio is in EDT timezone but PHP::DateTime uses these php timezones and I cannot seem to find one that gives me correct time. America/New_York is off by an hour because until EDT ends we are +5 not 4.
I am confused. For example right now its 11:26AM roughly speaking and I get back 10:26AM. The server has the right time set on it, I tried using date_default_timezone_set("EDT") but this is not allowed.
$fromZone = 'Europe/London';
$toZone = 'American/New_York';
function adjustTime($time, $fromZone, $toZone){
$date = new DateTime($time, new DateTimeZone($fromZone));
$date->setTimezone(new DateTimeZone($toZone));
return $date->format('Y-m-d H:i:s');
}
For example: I receive from a soap web service "2010-09-23 15:25:56" which is Europe/London time and it should be transformed to "2010-09-23 11:25:56" which is EDT time. I was trying to use the function above and this is returning back "2010-09-23 10:25:56"
"America/New_York" should give you the right value, given that at the time of this writing it's 11.36 in New York too. Note that that's UTC-4 (it's currently 15:35 UTC). In standard time, you're UTC-5.
EDT isn't really a "full" time zone - it's just the daylight part of it. A time zone name like "America/New_York" gives the complete time zone implementation.
Now as to why your server is giving the wrong value, that's a different matter... if you ask for the UTC time, what does it give you?
EDIT: As mentioned in the comments, the fix is to convert from UTC, not from Europe/London:
$date = new DateTime($time, new DateTimeZone('UTC'))
(There may be a better way of doing it; I'm not a PHP developer.)
Related
I am facing the following problem when converting a date value using strtotime().
If I do: strtotime('1/1/2019') the output would be 1546293600 -> 31.12.2018 # 10:00pm (UTC)
If I do: date_default_timezone_get() the output is Europe/Bucharest
In my php.ini file (of my hosting account), the timezone is set to date.timezone="Europe/Helsinki"
I have following two questions.
Shouldn't date_default_timezone_get() output what it is configured
in my hosting accounts php.ini file? (the
date_default_timezone_set() is not being used)?
Why the strtotime() conversion result is on GMT-2 timezone? It is
my understanding that if there is no timestamp supplied, the
conversion should be done on the current time (which should be
GMT+2, either Helsinki or Bucharest)?
If I do date_default_timezone_set('UTC') the conversion result of strtotime('1/1/2019) is done correctly (on GMT+2).
Thank you.
There may be some reasons why this is happening and we can't tell you why, because we don't know your application, since it may somewhere change the time zone at runtime.
Instead you should stop using strtotime and embrace object oriented DateTime functions.
Using DateTime you can define your date along with its time zone:
// local time
$date = new \DateTimeImmutable('1/1/2019', new \DateTimeZone('Europe/Bucharest'));
echo $date->format('U > d.m.Y (e)') , '<br>';
// convert to UTC
echo $date->setTimeZone(new \DateTimeZone('UTC'))->format('U > d.m.Y (e)');
The library is quite powerful and much more verbose than operating on strings and unix timestamps.
Provide hour and timezone to the function using the full IS0 8601 format 2019-01-01T12:00:00+00:00. That way you will get the correct timestamp in UTC. If you won't use the hour I recommend to use 12 AM.
In the following example I will use a numeric date array to build this string
// [Y,m,d]
$date = [2019,1,1];
for($i=1; $i<3; $i++){
$date[$i] = str_pad($date[$i],2,'0',STR_PAD_LEFT);
}
$t1 = strtotime(implode('-',$date).'T12:00:00+00:00');
echo date('r',$t1);
//=>Tue, 01 Jan 2019 12:00:00 +0000
I'm fairly new to PHP so forgive me if this is a stupid mistake that I haven't spotted
I've run into a problem where in our current system where we currently used strtotime and it was returning our date an hour ahead than it actually was set. E.g 1:15pm became 2:15pm when I set the timezone to be European rather than GMT.
I read that strotime had this problem but I can't get it to observe a different timezone if I try and set it.
So I tried working with PHPs DateTime instead.
The user enters the time and they select it as 1:15PM however we want to store it as 13:15. So I did this:
$t = DateTime::createFromFormat('h:i A', $venue['startTime']);
$t_24 = $t->format('H:i:s');
Then I try and create my Date object
$d = DateTime::createFromFormat('d-m-Y H:i:s', $venue['startDay'] . ' ' . $t_24);
$d->setTimezone(new DateTimeZone('America/New_York'));
echo ' ' . $d->getTimestamp();
Trying to set the timezone after the object is set because apparently it doesn't work if you add the timezone as the third argument in createFromFormat
My computers time is currently observing European time currently GMT+1 because we're observing daylight savings time in the UK, I select the time set on the through our system as 1:15pm and because I've set the timezone I expect the timestamp outputted equivalent to 7:15am as it's six hours behind European time, however when I convert the timestamp 1500639300 it's still equal to 2:15 PM. Probably done something stupid but can't quite figure out what? Any help would be appreciated :)
Timestamps have no time zone - they are always in UTC time. If you want to save timezone related data use another format! For example save in H:i:s, as you need it.
you can use gmdate() Function for this
<?php $current_time = gmdate('Y-m-d H:i:s'); ?>
http://php.net/manual/en/function.gmdate.php
i have problem with PHP strtotime converting to different timezone.
My code is simple:
<?php
date_default_timezone_set("Europe/Bratislava");
echo date("H:i",strtotime("20:00 America/New_York"));
?>
This code is returning: 02:00.
But it should return 14:00.
Can you help me please to fix this?
This code is returning: 02:00. But it should return 14:00.
No, it's right. You're converting from 8pm in New York (currently UTC-4 due to DST) into the Europe/Bratislava time zone (currently UTC+2 due to DST).
So:
New York: 8pm
UTC: Midnight
Bratislava: 2am
If you're trying to convert from a Europe/Bratislava time into a New York time, then you need to switch your time zone IDs.
Either I'm losing my mind, or I've not got the faintest idea what I'm doing. I'm leaning towards the latter.
I'm trying to convert this: 1316826000, which I'm pretty confident should be Sat, 24 Sep 2011 01:00:00 GMT
http://www.onlineconversion.com/unix_time.htm confirms this.
http://www.unixtimestamp.com/index.php tells me 09 / 23 / 11 # 8:00:00pm EST, so far so good. I happen to be in EST, this is the result I'd like to get back from PHP.
When I do date('l, M d, Y, h:ia', $iTime), I get: Friday, Sep 23, 2011, 12:00am, a full 20 hours off.
I've confirmed the server's time is correct using date('c'). date('c') output is: 2012-05-19T03:19:20+00:00. The server is in the central time zone, where it is currently 10:20pm. May 18.
echo date_default_timezone_get() outputs "GMT" (set somewhere else in the script using date_default_timezone_set('GMT'))
What am I missing? Nothing I've read so far can explain how I'm getting a result 20 hours behind what it should be. Were it an hour fast or slow, I could at least wrap my head around it being some sort of DST idiotry, but 20? Crazyness! Thanks for reading!
Check what your php.ini says for date.timezone.
In unix it is usually here: /etc/php.ini
Then use a proper timezone recognized by PHP:
http://www.php.net/manual/en/timezones.php
date.timezone = 'America/New_York'
Then reload your web server.
Unix time just means the number of seconds since epoch. Has nothing to do with timezones. Timezones simply add or subtract 1 hour (3600 seconds) from the unix time for each zone you move away from GMT.
An example:
$userTimezone = new DateTimeZone('America/New_York');
$gmtTimezone = new DateTimeZone('GMT');
$myDateTime = new DateTime('2014-01-22 11:44', $gmtTimezone);
$offset = $userTimezone->getOffset($myDateTime);
echo $offset;
That will output: -14400 or 4 hours. Which is the difference between New York and GMT
Using some Java code with the Joda-Time 2.3 library, as I don't know PHP…
long m = 1316826000L;
DateTime dateTimeUtc = new DateTime( m * 1000L, DateTimeZone.UTC );
DateTime dateTimeNewYork = dateTimeUtc.toDateTime( DateTimeZone.forID( "America/New_York" ) );
System.out.println( "dateTimeUtc: " + dateTimeUtc );
System.out.println( "dateTimeNewYork: " + dateTimeNewYork );
I can tell you that 1316826000 seconds from the beginning of 1970 UTC/GMT (Unix Epoch) is…
dateTimeUtc: 2011-09-24T01:00:00.000Z
dateTimeNewYork: 2011-09-23T21:00:00.000-04:00
So, as the commenter stated, it would be 8 PM in EST but EST was not in effect on that day. DST (Daylight Saving Time) (idiocy, as you correctly noted) was in effect until November 9 of that year (2011). So the time of day is pushed forward one hour, to 9 PM.
In GMT/UTC, that means 1 AM in the morning of the next day.
Standard time in east coast US is 5 hours behind UTC/GMT. With DST it is 4 hours behind UTC/GMT (one hour closer).
Where you got confused:
Your time format/conversion in incorrect.I can't help with that as I don't know PHP.
You should be using a competent date-time library for this kind of work.Date-time work is complicated, tricky, confusing, and error-prone.This question discusses possibilities of Joda-Time (for Java) sorts of libraries for PHP.
You used three-letter time zone codes. Avoid these.Those codes are neither standardized nor unique -- there are common duplicates. Instead, use proper time zone names. In your case of east coast US, "America/New_York". Furthermore, in this case you confused the time zone area and rules (east coast US) with a particular application of those rules (EST). Saying "America/New_York" means "whatever time zone rules were in effect on that date, whereas saying "EST" (if interpreted to mean Eastern Standard Time in US) means "UTC-05:00". So either (a) use a time zone name such as "America/New_York", or (b) use a specific offset such as "-05:00".
I searched the PHP manual and StackOverflow too, but haven't really found a proper answer to my question. My dates are stored in UTC. Now if I do:
$date = new DateTime('2012-03-16 14:00:00', 'UTC');
$date->setTimezone('Europe/Budapest');
Will DateTime::setTimezone() set DST automatically? So if I format the string, will it output 15:00:00 in summer time and 16:00:00 in winter time? Or will I have to set DST manually?
Related question, if I want to get a DST independent UTC time (that I can store), will the following work?
$date = new DateTime('now', 'UTC');
$date->format('Y-m-d H:i:s');
Or better to use simple gmdate('Y-m-d H:i:s')?
Your assumption is correct.
In addition, this would have taken you 10 seconds to verify yourself.
Edit:
The correct syntax is:
$date = new DateTime('2012-03-16 14:00:00', new DateTimeZone('UTC'));
As to your second question. The timezone passed in the DateTime constructor is the 'reference' timezone.
You should still call ->setTimeZone(new DateTimeZone('UTC')) to format it in the UTC timezone, unless the default timezone was also set to UTC (date_default_timezone_set).
Next time, try a little harder trying stuff out before asking.