Convert between date and unix timestamp: Difference between revisions
Jump to navigation
Jump to search
| Line 4: | Line 4: | ||
<tr> | <tr> | ||
<th> format \ date </th> | <th> format \ date </th> | ||
<th> 1900/1/0</th> | <th> 1900/1/0 (1899/12/31)</th> | ||
<th> 1900/1/1</th> | <th> 1900/1/1</th> | ||
<th> 1970/1/1</th> | <th> 1970/1/1</th> | ||
Revision as of 08:04, 25 July 2019
terms of time format
| format \ date | 1900/1/0 (1899/12/31) | 1900/1/1 | 1970/1/1 | 2016/1/1 | notes |
|---|---|---|---|---|---|
| value of unix timestamp (the number of seconds since 1970/01/01[1]) |
-2209075200 | -2208988800 | 0 | 1451606400 | |
| value of Excel DATEVALUE function (Excel: number of days since 1900/1/1) |
0 | 1 | 25569 | 42370 | 5 digit numbers after 1970/1/1 |
VALUE() function on Excel is number of days since 1900/1/1. VALUE() function on Google sheet is number of days since 1899/12/30 [Last visited: 2019-05-22]
Convert between date and unix timestamp
Online tool
// timestamp: 1552521600 // Is equivalent to: // 03/14/2019 @ 12:00am (UTC) // 2019-03-14T00:00:00+00:00 in ISO 8601 // Thu, 14 Mar 2019 00:00:00 +0000 in RFC 822, 1036, 1123, 2822 // Thursday, 14-Mar-19 00:00:00 UTC in RFC 2822 // 2019-03-14T00:00:00+00:00 in RFC 3339
PHP way: convert to date time from unix timestamp
Using the date() function & date_default_timezone_set
date_default_timezone_set('UTC');
$timestamp = 0;
echo date('Y-m-d H:i:s', $timestamp) . PHP_EOL; // 1970-01-01 00:00:00
date_default_timezone_set("Europe/London");
$timestamp = 1552521600;
echo date('Y-m-d H:i:s', $timestamp) . PHP_EOL; // 2019-03-14 00:00:00
date_default_timezone_set("Asia/Taipei");
$timestamp = 1552521600;
echo date('Y-m-d H:i:s', $timestamp) . PHP_EOL; // 2019-03-14 08:00:00
PHP way: convert to unix timestamp from date time
Using the strtotime() function
date_default_timezone_set("Europe/London");
echo strtotime('2019-03-14 00:00:00') . PHP_EOL; // 1552521600
date_default_timezone_set("Asia/Taipei");
echo strtotime('2019-03-14 08:00:00') . PHP_EOL; // 1552521600