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Test Valid Date String for JavaScript

发表日子 2013-05-31 20:44:00
最后修正 2023-11-22 15:29:06

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("May 06, 2025 01:15:30 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
0May 06, 2025 01:15:30 GMT+0200++++++
1May 06 2025 01:15:30 GMT+0200++++++
2May 06, 2025 01:15:30 GMT+2++++++
32025-05-06 01:15:30 GMT+0200-+--++
42025-05-06 01:15:30 GMT+02:00-+--++
52025-05-06 01:15:30 GMT+200-+--++
606 May 2025 01:15:30+02:00-+----
7May 06 2025 01:15:30 GMT+2:00-++-++
8May 06, 2025 01:15:30 GMT+02:00-++-++
92025-05-06 01:15:30 GMT+2-+--++
102025-05-06 01:15:30-+--++
112025-05-06T01:15:30+02:00+++++-
122025-05-06 01:15:30+02:00-+----
1305-06-2025 01:15:30 GMT+0200++---+
1405/06, 2025 01:15:30 GMT+0200+++-++
1506-May-2025 01:15:30 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 "2025-05-06 01:15:30" 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, May 06, 2025 01:15:30 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
0May 06, 2025 01:15:30 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, May 06 2025 01:15:30 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
1May 06 2025 01:15:30 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, May 06, 2025 01:15:30 GMT+2 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
2May 06, 2025 01:15:30 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, 2025-05-06 01:15:30 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
32025-05-06 01:15:30 GMT+0200-+--++

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

For example, 2025-05-06 01:15:30 GMT+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
42025-05-06 01:15:30 GMT+02:00-+--++

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

For example, 2025-05-06 01:15:30 GMT+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
52025-05-06 01:15:30 GMT+200-+--++

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

For example, 06 May 2025 01:15:30+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
606 May 2025 01:15:30+02:00-+----

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

For example, May 06 2025 01:15:30 GMT+2:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
7May 06 2025 01:15:30 GMT+2:00-++-++

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

For example, May 06, 2025 01:15:30 GMT+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
8May 06, 2025 01:15:30 GMT+02:00-++-++

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

For example, 2025-05-06 01:15:30 GMT+2 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
92025-05-06 01:15:30 GMT+2-+--++

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

For example, 2025-05-06 01:15:30 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
102025-05-06 01:15:30-+--++

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

For example, 2025-05-06T01:15:30+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
112025-05-06T01:15:30+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, 2025-05-06 01:15:30+02:00 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
122025-05-06 01:15:30+02:00-+----

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

For example, 05-06-2025 01:15:30 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
1305-06-2025 01:15:30 GMT+0200++---+

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

For example, 05/06, 2025 01:15:30 GMT+0200 =>

#js new Date() FeedIEChromeFirefoxSafariOperaMobile
1405/06, 2025 01:15:30 GMT+0200+++-++

JavaScript new Date() running results at one single glance under Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

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\TOMay 06, 2025 01:15:30 GMT+0200
1M d Y H:i:s \G\M\TOMay 06 2025 01:15:30 GMT+0200
2May 06, 2025 01:15:30 GMT+2
3Y-m-d H:i:s \G\M\TO2025-05-06 01:15:30 GMT+0200
4Y-m-d H:i:s \G\M\TP2025-05-06 01:15:30 GMT+02:00
52025-05-06 01:15:30 GMT+200
6d M Y H:i:s \G\M\TP06 May 2025 01:15:30+02:00
7May 06 2025 01:15:30 GMT+2:00
8M d Y H:i:s \G\M\TPMay 06, 2025 01:15:30 GMT+02:00
92025-05-06 01:15:30 GMT+2
10Y-m-d H:i:s2025-05-06 01:15:30
11c2025-05-06T01:15:30+02:00
12Y-m-d H:i:sP2025-05-06 01:15:30+02:00
13m-d-Y H:i:s\G\M\TO05-06-2025 01:15:30 GMT+0200
14m/d, Y H:i:s\G\M\TO05/06, 2025 01:15:30 GMT+0200
15d-M-Y H:i:s \G\M\TO06-May-2025 01:15:30 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("May 06, 2025 01:15:30 GMT+0200"));
</script>

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