I already asked a question like this (Set date field in D8).

Ok duplicate entry? NO!

Now i have also to set a time and i'm using a array. My code looks like this.

$field_array = [
##begin of creating node
'uid' => $new_old_uid["new_uid"],
'type' => $content_type,
'langcode' => $lang,
'status' => (!empty($import_node->status)) ? $import_node->status : 0,

#### How to create date with times?
#Every Version causes that error -> Array to string conversion in ....
### Version 1
'field_event_date_start' => [[ "value"=> date('Y-m-d H:i:00',$imported_date) ]],
'field_event_date_end' => [[ "value"=> date('Y-m-d H:i:00',$imported_date) ]],
### Version 2
'field_event_date_start' => [ "value"=> date('Y-m-d H:i:00',$imported_date) ],
'field_event_date_end' => [ "value"=> date('Y-m-d H:i:00',$imported_date) ],

### How to add a url?
'field_event_url' => (!empty($import_node->field_event_url)) ? array('value'=> $imported_url) : null,

UPDATE: Another try for datetime field:

'field_event_date_start' => array(
    "value" => array(
        "date" => date('Y-m-d',$imported_date),
        "time" => date('H:i:00',$imported_date)

Now I'm getting following error: Placeholders must have a trailing [] if they are to be expanded with an array of values.


Datetime fields in Drupal 8 are stored as strings. So you need to convert it into string.

You can use the format method, e.g.

$formatted_date = $date->format('Y-m-d H:i:s');

Refer Inserting the value from Datetime field form

You can also use T as separator,


\DateTime::format("Y-m-d\TH:i:s"); //need a escape character in front of T.

Refer Why is my Datetime field not saved?

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  • thx works like charm! – themca Sep 20 '16 at 7:14

If your date field is not a DATETIME but a DATE, use a different format. And a better solution would be to use the Datime object constant to get the format.

constant DATETIME_STORAGE_FORMAT :: string(12) "Y-m-d\TH:i:s"
constant DATE_STORAGE_FORMAT :: string(5) "Y-m-d"

Working example.

$dtime = DateTime::createFromFormat("m/d/Y - G:i", $row->Date); // not needed
$dtime->setTimezone(new \DateTimezone(DateTimeItemInterface::STORAGE_TIMEZONE));
$dtimeFormat = $dtime->format(DateTimeItemInterface::DATE_STORAGE_FORMAT);

$article->set('field_date', $dtimeFormat);
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This works great for date fields, as noted. However, if you need to update a timestamp based field use something like:

 $entityref->set('field_timestamp_field', $source_date->getTimestamp());
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