Day of week: Difference between revisions

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== Weekday ==
== Weekday ==
The value of weekday obtained from different approaches.
<div style="width:100%; min-height: .01%; overflow-x: auto;">
{| class="wikitable sortable nowrap"
{| class="wikitable sortable nowrap"
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! style="text-align:right;" | Day
! style="text-align:right;" | Weekday values from different approaches
! Sunday
! Sunday
! Monday
! Monday
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! Saturday
! Saturday
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|-
! Weekday (ISO-8601 [http://php.net/manual/en/function.date.php PHP date] N character)
! [http://php.net/manual/en/function.date.php PHP date] with N format character: Weekday ([https://en.wikipedia.org/wiki/ISO_week_date ISO-8601])
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! Weekday ([https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_weekday MySQL])
! [https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_weekday MySQL WEEKDAY() function]
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! Weekday ([https://support.office.com/zh-tw/article/WEEKDAY-%E5%87%BD%E6%95%B8-60e44483-2ed1-439f-8bd0-e404c190949a Excel])
! [https://www.w3schools.com/sql/func_mysql_dayofweek.asp MySQL DAYOFWEEK() Function]
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! [https://support.office.com/zh-tw/article/WEEKDAY-%E5%87%BD%E6%95%B8-60e44483-2ed1-439f-8bd0-e404c190949a Excel WEEKDAY() function]
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! Weekday ([http://php.net/manual/en/function.date.php PHP date] w character)
! [http://php.net/manual/en/function.date.php PHP date] with w format character
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</div>


== Get the date ==
Get the date of weekday from another known date (today or another specific day)


== Get the date ==
<div style="width:100%; min-height: .01%; overflow-x: auto;">
{| class="wikitable sortable nowrap"
{| class="wikitable sortable nowrap"
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! Last week
! Last week
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL -8 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())-6</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">-8</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())-6</nowiki>}}<br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("Sunday -14 day")) . PHP_EOL;</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">-7</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())-5</nowiki>}}<br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("monday this week -7 day")) . PHP_EOL;</nowiki>}}
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| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">-3</span> - WEEKDAY(CURDATE()) DAY;}} <br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('Friday -7 day')) . PHP_EOL;</nowiki>}}
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| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">-2</span> - WEEKDAY(CURDATE()) DAY;}} <br /> PHP<ref>[https://stackoverflow.com/questions/3742820/php-how-to-get-previous-sunday-of-a-specific-date-in-the-past PHP: How to get previous Sunday of a specific date in the past..? - Stack Overflow]</ref>: (1) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("last Saturday")) . PHP_EOL;</nowiki>}} (2) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('last Saturday', strtotime("2018-03-04 00:01:00"))) . PHP_EOL;</nowiki>}}
| PHP<ref>[https://stackoverflow.com/questions/3742820/php-how-to-get-previous-sunday-of-a-specific-date-in-the-past PHP: How to get previous Sunday of a specific date in the past..? - Stack Overflow]</ref>: (1) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("last Saturday")) . PHP_EOL;</nowiki>}} (2) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('last Saturday', strtotime("2018-03-04 00:01:00"))) . PHP_EOL;</nowiki>}}
|-
|-
! This week
! This week
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL -1 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+1</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">-1</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+1</nowiki>}}<br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("Sunday -7 day")) . PHP_EOL;</nowiki>}}
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL 0 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+2</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">0</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+2</nowiki>}}<br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("monday this week")) . PHP_EOL;</nowiki>}}
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL 1 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+3</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">1</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+3</nowiki>}}
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL 2 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+4</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">2</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+4</nowiki>}}
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL 3 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+5</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">3</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+5</nowiki>}}
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL 4 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+6</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">4</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+6</nowiki>}}<br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('Friday')) . PHP_EOL;</nowiki>}}
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL 5 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+7</nowiki>}} <br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("Saturday")) . PHP_EOL;</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">5</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+7</nowiki>}} <br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("Saturday")) . PHP_EOL;</nowiki>}}
|-
|-
! Next week
! Next week
| MySQL: {{kbd | key=<nowiki>SELECT CURDATE() + INTERVAL 6 - WEEKDAY(CURDATE()) DAY;</nowiki>}} <br />Excel: {{kbd | key=<nowiki>=NOW()-WEEKDAY(NOW())+8</nowiki>}}
| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">6</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+8</nowiki>}}<br />PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("Sunday")) . PHP_EOL;</nowiki>}}
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| MySQL: {{kbd | key=SELECT CURDATE() + INTERVAL <span class="hightlight">7</span> - WEEKDAY(CURDATE()) DAY;}} <br />Excel: {{kbd | key=<nowiki>=TODAY()-WEEKDAY(NOW())+9</nowiki>}}<br />PHP: (1) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("next monday")) . PHP_EOL;</nowiki>}} (2) {{kbd | key=<nowiki>echo date('Y-m-d', strtotime("monday this week +7 day")) . PHP_EOL;</nowiki>}}
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| PHP: {{kbd | key=<nowiki>echo date('Y-m-d', strtotime('Friday +7 day')) . PHP_EOL;</nowiki>}}
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|}
|}
 
</div>
 


== References ==
== References ==
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* [https://stackoverflow.com/questions/23020162/how-to-get-this-coming-sundays-date mysql - How to get this coming Sunday's date? - Stack Overflow]
* [https://stackoverflow.com/questions/23020162/how-to-get-this-coming-sundays-date mysql - How to get this coming Sunday's date? - Stack Overflow]
* [https://support.microsoft.com/zh-tw/help/827327/how-to-return-a-day-of-the-week-for-a-date-in-excel 如何在 Excel 中傳回的日期星期幾]
* [https://support.microsoft.com/zh-tw/help/827327/how-to-return-a-day-of-the-week-for-a-date-in-excel 如何在 Excel 中傳回的日期星期幾]
* [https://support.office.com/zh-tw/article/today-%E5%87%BD%E6%95%B8-5eb3078d-a82c-4736-8930-2f51a028fdd9 TODAY 函數 - Office 支援]


[[Category:PHP]]  
[[Category:PHP]]  

Revision as of 18:47, 13 May 2019

Numeric representation of the day of the week. MySQL, Excel or PHP approaches to specify these date time.

Weekday

The value of weekday obtained from different approaches.

Weekday values from different approaches Sunday Monday Tuesday Wednesday Thursday Friday Saturday
PHP date with N format character: Weekday (ISO-8601) 7 1 2 3 4 5 6
MySQL WEEKDAY() function 6 0 1 2 3 4 5
MySQL DAYOFWEEK() Function 1 2 3 4 5 6 7
Excel WEEKDAY() function 1 2 3 4 5 6 7
PHP date with w format character 0 1 2 3 4 5 6

Get the date

Get the date of weekday from another known date (today or another specific day)

Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Last week MySQL: SELECT CURDATE() + INTERVAL -8 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())-6
PHP: echo date('Y-m-d', strtotime("Sunday -14 day")) . PHP_EOL; 		MySQL: SELECT CURDATE() + INTERVAL -7 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())-5
PHP: echo date('Y-m-d', strtotime("monday this week -7 day")) . PHP_EOL; 		MySQL: SELECT CURDATE() + INTERVAL -3 - WEEKDAY(CURDATE()) DAY;
PHP: echo date('Y-m-d', strtotime('Friday -7 day')) . PHP_EOL; 		MySQL: SELECT CURDATE() + INTERVAL -2 - WEEKDAY(CURDATE()) DAY;
PHP[1]: (1) echo date('Y-m-d', strtotime("last Saturday")) . PHP_EOL; (2) echo date('Y-m-d', strtotime('last Saturday', strtotime("2018-03-04 00:01:00"))) . PHP_EOL;
This week MySQL: SELECT CURDATE() + INTERVAL -1 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+1
PHP: echo date('Y-m-d', strtotime("Sunday -7 day")) . PHP_EOL; 		MySQL: SELECT CURDATE() + INTERVAL 0 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+2
PHP: echo date('Y-m-d', strtotime("monday this week")) . PHP_EOL; 		MySQL: SELECT CURDATE() + INTERVAL 1 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+3 		MySQL: SELECT CURDATE() + INTERVAL 2 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+4 		MySQL: SELECT CURDATE() + INTERVAL 3 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+5 		MySQL: SELECT CURDATE() + INTERVAL 4 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+6
PHP: echo date('Y-m-d', strtotime('Friday')) . PHP_EOL; 		MySQL: SELECT CURDATE() + INTERVAL 5 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+7
PHP: echo date('Y-m-d', strtotime("Saturday")) . PHP_EOL;
Next week MySQL: SELECT CURDATE() + INTERVAL 6 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+8
PHP: echo date('Y-m-d', strtotime("Sunday")) . PHP_EOL; 		MySQL: SELECT CURDATE() + INTERVAL 7 - WEEKDAY(CURDATE()) DAY;
Excel: =TODAY()-WEEKDAY(NOW())+9
PHP: (1) echo date('Y-m-d', strtotime("next monday")) . PHP_EOL; (2) echo date('Y-m-d', strtotime("monday this week +7 day")) . PHP_EOL; 		PHP: echo date('Y-m-d', strtotime('Friday +7 day')) . PHP_EOL;

References

  1. ↑ PHP: How to get previous Sunday of a specific date in the past..? - Stack Overflow

Further reading

Retrieved from "https://wiki.planetoid.info/index.php?title=Day_of_week&oldid=20660"