Wikipedia:Picture of the day

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The picture of the day is an image which is automatically updated each day with an image from Wikipedia:Featured pictures. Although the picture of the day is generally scheduled by one editor, anybody can contribute. If you have concerns about the current picture of the day, please post at Wikipedia:Main Page/Errors. If you have concerns about an upcoming POTD, consider either fixing it yourself or posting at Wikipedia talk:Picture of the day.

January 18 - Fri

Drop impact
When a liquid drop impacts the surface of a liquid reservoir it can float, bounce, coalesce with the reservoir, or splash. A floating drop remains on the surface for several seconds. Drop bouncing can occur on perturbed liquid surfaces. If the drop is able to rupture the thin film of gas which separates it from the liquid reservoir, it can coalesce. Additionally, higher Weber number drop impacts produce splashing. In the splashing regime, the impacting drop creates a crater in the fluid surface, followed by a crown around the crater. Finally, a central jet, called the "Rayleigh jet" or "Worthington jet", protrudes from the center of the crater. If the impact energy is high enough, the jet rises to the point where it pinches off, sending one or more droplets upward out of the surface.Photograph: José Manuel Suárez

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Guidelines[edit]

  1. The picture must already be a featured picture. To nominate a picture for that honor see featured picture candidates.
  2. Featured images are currently selected in roughly the order in which they were promoted (i.e. a First In, First Out order). See the featured pictures candidates archive for this order. Exceptions are made for anniversaries of events, or for national holidays.
  3. Not all featured pictures will appear as POTD. Wikipedia:Picture of the day/Unused has a list of those that have been skipped.
See also: Guidelines for writing Picture of the day captions

POTD on your user page[edit]

You can insert the image on your user page or talk page by adding the text {{Pic of the day}} (this version is shown above). It will be displayed in a box of no more than 600 pixels wide, and will include a small amount of text based on the article in which the image appears. A no-text version is also available via {{POTD}}.

It is also possible to create your own custom POTD layouts, in case the already-existing versions will not look good within your user page design. Mix and match the following components to make your own. This system will only work for Pictures of the day selected beginning January 1, 2007. Be sure to replace [date] with an appropriate date value. For a dynamically updating version, use {{#time:Y-m-d}} (example: {{POTD/{{#time:Y-m-d}}|image}}).

Template Description Renders as
{{POTD/[date]|image}} The name of the image, without the Image: prefix. Water drop 001.jpg
{{POTD/[date]|size}} The size of the image, without the trailing px. 399
{{POTD/[date]|caption}} The image caption. When a liquid drop impacts the surface of a liquid reservoir it can float, bounce, coalesce with the reservoir, or splash. A floating drop remains on the surface for several seconds. Drop bouncing can occur on perturbed liquid surfaces. If the drop is able to rupture the thin film of gas which separates it from the liquid reservoir, it can coalesce. Additionally, higher Weber number drop impacts produce splashing. In the splashing regime, the impacting drop creates a crater in the fluid surface, followed by a crown around the crater. Finally, a central jet, called the "Rayleigh jet" or "Worthington jet", protrudes from the center of the crater. If the impact energy is high enough, the jet rises to the point where it pinches off, sending one or more droplets upward out of the surface.
{{POTD/[date]|title}} A link to the article the image represents. Drop impact
{{POTD/[date]|texttitle}} A linkless short caption, also useful as an alt attribute. Drop impact

There are two additional pre-defined layouts

  • {{POTD/{{#time:Y-m-d}}|column}}: This has the image and caption above each other with no borders. Used on some of the Main Page alternatives and suitable for user pages as well.
  • {{POTD/{{#time:Y-m-d}}|row}}: This has the image and caption encapsulated in (usually) a single table row. This is the version used on the Main Page.

It is also possible to permanently feature a POTD for a selected day. Just add a specific value for the date you want. For example, today's POTD is {{POTD/2019-01-18|image}}. Likewise, you can use date parameters with the other templates as well. If you like the pre-made formats, you can use date parameters there as well, like this: {{Pic of the day|date=2019-01-18}} or {{POTD|date=2019-01-18}}. Again, this system will only work for Pictures of the day selected beginning January 1, 2007.

As a Userbox[edit]

Code Result
{{User:CFeyecare/templates/POTD}}
Water drop 001.jpg This user enjoys the
Picture of the Day.¤
Usage

Random POTD[edit]

Use {{User:My Chemistry romantic/Templates/Random POTD}} to display a randomly-selected POTD.

{{User:Tyw7/picofday}} also displays a randomly-selected POTD but without all the header and footers

POTD thumb[edit]

When you want to display the POTD like an ordinary thumbnail, similar to {{WP:Wikimedia Commons/POTD}}, you can use {{POTD wikipedia}}. For instance, if you want a thumbnailed version, floated right, you can use : {{POTD wikipedia|float=right|title=yes|thumb=yes}}.

Older Pictures of the day[edit]

If you want to permanently include a Picture of the day that was selected between November 1, 2004 and December 31, 2006, use the following: {{Wikipedia:Picture of the day/[month] [day], [year]}} or {{Wikipedia:POTD/[month] [day], [year]}}. For example, {{Wikipedia:Picture of the day/December 31, 2006}}.

PsOTD selected from May 2004 through October 2004 are only accessible in month-at-a-time archives and can only be placed on user pages by using standard image syntax.


Picture of the day archive



Today is Friday, January 18, 2019; it is now 18:40 UTC