UserAccountAge provides appends a user tag to the Oasis masthead that lists the specific account's age. The user tag, when clicked, links to formatted JSON data displaying the moment of account creation. (example)
It was initially conceived as a "FANDOMization" and simplification of PleaseStand'sUserInfo script on the English Wikipedia, though the most recent iteration of the script, namely code2.js, instead employs the jQuery timeago plugin, removing the hacky attempts at formatting fuzzy dates and opening the script up to a wider variety of user languages. Furthermore, the formatted date of account creation is now displayed upon cursor hover over the user tag.
Occasionally, for certain old accounts (2005 and earlier), the MediaWiki API returns a value of "null" for the user's registration date, and as such, no user tag is displayed on the user masthead.
Note: In this example, pay close attention to the placement of commas and other punctuation. For people who aren't familiar with programming (and even those who are!), a common mistake when writing code is to accidentally delete, forget, or misplace critical symbols like commas or quotation marks. This can cause a syntax error that breaks the code. Carefully follow the convention shown here when using importArticles.