When HTML5 & CSS3 invented ?

HTML5 and CSS3 were developed as newer versions of the HTML and CSS standards, introducing new features and improvements to web development. Here are their approximate invention dates:

1. HTML5:
   • HTML5 was introduced as a draft specification by the World Wide Web Consortium (W3C) in January 2008.
   • The final recommendation of HTML5 was published on October 28, 2014.
2. CSS3:
   • CSS3 is not a single specification like previous versions of CSS; it consists of multiple modules that were developed and released independently.
   • The first CSS3 modules were published in the early 2000s, and subsequent modules were introduced over the years.
   • CSS3 as a collective term refers to the advancements and new features introduced through these individual modules.

It’s important to note that while HTML5 and CSS3 were introduced on these dates, their adoption and implementation across web browsers and development practices took some time, with different features becoming widely supported at different rates.