Test Valid Date String for JavaScript

Créé : Vendredi 31 Mai 2013 20:44:00
Mise à jour : Vendredi 29 Juin 2018 21:51:53

Here we check the valid strings for the argument of the Date:: class constructor to create Date object under JavaScript, ie,
<script type="text/javascript">
var objDate;
objDate = new Date("Aug 19, 2018 09:20:49 GMT+0200");
<script>
We are trying to get the PHP date format string to format date time to form the pipeline PHP DateTime() => js Date() => document.write() to output on screen. Here is the summary of cases we tested for you:
#js new Date() FeedIEChromeFirefoxSafariOperaMobile
0Aug 19, 2018 09:20:49 GMT+0200++++++
1Aug 19 2018 09:20:49 GMT+0200++++++
2Aug 19, 2018 09:20:49 GMT+2++++++
32018-08-19 09:20:49 GMT+0200-+--++
42018-08-19 09:20:49 GMT+02:00-+--++
52018-08-19 09:20:49 GMT+200-+--++
619 Aug 2018 09:20:49+02:00-+----
7Aug 19 2018 09:20:49 GMT+2:00-++-++
8Aug 19, 2018 09:20:49 GMT+02:00-++-++
92018-08-19 09:20:49 GMT+2-+--++
102018-08-19 09:20:49-+--++
112018-08-19T09:20:49+02:00+++++-
122018-08-19 09:20:49+02:00-+----
1308-19-2018 09:20:49 GMT+0200++---+
1408/19, 2018 09:20:49 GMT+0200+++-++
1519-Aug-2018 09:20:49 GMT+0200-+-+-+
Tab. I: + Valid Date Time String for Javascript::Date() class, - Invalid.

JavaScript is very English speaking. In effect, among the 3 first universal formats, the English month abbreviation is used. As it can be observed that no pure numerical date string is found like "2018-08-19 09:20:49" to fit JavaScript syntax in all browsers. Please check this with your preferred browser.

Detail of JavaScript Tests

Below, the bold date time outputs at the right hand side of => are the JavaScript Date Class results.

0. Good Format "mmm dd, yyyy hh:mm:ss GMT+0200"

For example, Aug 19, 2018 09:20:49 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
0Aug 19, 2018 09:20:49 GMT+0200++++++

This format is valid for all browsers in our hands, including Internet Explorer, Google Chrome, Firefox, Safari, Opera, Mobile Safari. On PHP, you get this DateTime format of the current time by

<?php
$objDateTime = new DateTime();
$strDateTime = $objDateTime->format("M d, Y H:i:s \G\M\TO");
?>
One observes that this is the Standard English Date Time expression.

1. Another Good Format "mmm dd yyyy hh:mm:ss GMT+0200"

For example, Aug 19 2018 09:20:49 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
1Aug 19 2018 09:20:49 GMT+0200++++++

This format is also valid for all browsers in our hands, including IE, Google Chrome, Firefox, Safari, Opera, Safari Mobile. On PHP, you get this DateTime format of the current time by

<?php
$objDateTime = new DateTime();
$strDateTime = $objDateTime->format("M d Y H:i:s \G\M\TO");
?>
One notes that this is another English Date Time expression with timezone.

2. Good Format "mmm dd, yyyy hh:mm:ss GMT+2"

For example, Aug 19, 2018 09:20:49 GMT+2 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
2Aug 19, 2018 09:20:49 GMT+2++++++
As shown, you can shorten the timezone notification.

Bad Formats

All following date time strings are good for some browsers, but unfortunately bad for others.

3. Format "yyyy-mm-dd hh:mm:ss GMT+0200"

For example, 2018-08-19 09:20:49 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
32018-08-19 09:20:49 GMT+0200-+--++

4. Format "yyyy-mm-dd hh:mm:ss GMT+02:00"

For example, 2018-08-19 09:20:49 GMT+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
42018-08-19 09:20:49 GMT+02:00-+--++

4. Format "yyyy-mm-dd hh:mm:ss GMT+0200"

For example, 2018-08-19 09:20:49 GMT+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
52018-08-19 09:20:49 GMT+200-+--++

6. Format "dd mmm yyyy hh:mm:ss+02:00"

For example, 19 Aug 2018 09:20:49+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
619 Aug 2018 09:20:49+02:00-+----

7. Format "mmm dd yyyy hh:mm:ss GMT+02:00"

For example, Aug 19 2018 09:20:49 GMT+2:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
7Aug 19 2018 09:20:49 GMT+2:00-++-++

8. Format "mmm dd, yyyy hh:mm:ss GMT+02:00"

For example, Aug 19, 2018 09:20:49 GMT+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
8Aug 19, 2018 09:20:49 GMT+02:00-++-++

9. Format "yyyy-mmm-dd hh:mm:ss GMT+2"

For example, 2018-08-19 09:20:49 GMT+2 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
92018-08-19 09:20:49 GMT+2-+--++

10. Format "yyyy-mmm-dd hh:mm:ss"

For example, 2018-08-19 09:20:49 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
102018-08-19 09:20:49-+--++

11. Format "yyyy-mmm-ddThh:mm:ss+02:00"

For example, 2018-08-19T09:20:49+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
112018-08-19T09:20:49+02:00+++++-
You get this format by PHP5 DateTime=>format('c'). It's regrettable that JavaScript Mobile Safari does not support this format, as this is the universal date time string, used by SQL server, MySQL Server, ...

12. Format "yyyy-mmm-dd hh:mm:ss GMT+02:00"

For example, 2018-08-19 09:20:49+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
122018-08-19 09:20:49+02:00-+----

13. Format "mm-dd-yyyy hh:mm:ss GMT+0200"

For example, 08-19-2018 09:20:49 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
1308-19-2018 09:20:49 GMT+0200++---+

14. Format "mm/dd, yyyy hh:mm:ss GMT+0200"

For example, 08/19, 2018 09:20:49 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
1408/19, 2018 09:20:49 GMT+0200+++-++

JavaScript new Date() running results at one single glance under CCBot/2.0 (https://commoncrawl.org/faq/)

Below, we summarize the date time feed checked above in a single table under your current browser.

#PHP DateTime->formatjs new Date() Feedjs new Date() outputs
0M d, Y H:i:s \G\M\TOAug 19, 2018 09:20:49 GMT+0200
1M d Y H:i:s \G\M\TOAug 19 2018 09:20:49 GMT+0200
2Aug 19, 2018 09:20:49 GMT+2
3Y-m-d H:i:s \G\M\TO2018-08-19 09:20:49 GMT+0200
4Y-m-d H:i:s \G\M\TP2018-08-19 09:20:49 GMT+02:00
52018-08-19 09:20:49 GMT+200
6d M Y H:i:s \G\M\TP19 Aug 2018 09:20:49+02:00
7Aug 19 2018 09:20:49 GMT+2:00
8M d Y H:i:s \G\M\TPAug 19, 2018 09:20:49 GMT+02:00
92018-08-19 09:20:49 GMT+2
10Y-m-d H:i:s2018-08-19 09:20:49
11c2018-08-19T09:20:49+02:00
12Y-m-d H:i:sP2018-08-19 09:20:49+02:00
13m-d-Y H:i:s\G\M\TO08-19-2018 09:20:49 GMT+0200
14m/d, Y H:i:s\G\M\TO08/19, 2018 09:20:49 GMT+0200
15d-M-Y H:i:s \G\M\TO19-Aug-2018 09:20:49 GMT+0200
Tab II: Real-Time JavaScript Date() Results with different Date time feed. See php.net: date — Format a local time/date.

Here the column "PHP DateTime->format" gives the format string to be used to obtain the "js new Date() Feed" column for JavaScript Date Constructor. The last column "js new Date() outputs" is JavaScript running results given by new Date(Date-Time String):

<script type="text/javascript">
document.write(new Date("Aug 19, 2018 09:20:49 GMT+0200"));
</script>

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