BibTeX and "accessed" field for web page

Question

Referring to the question how to cite web pages what is the best approach if you use Citavi and want to get an "Access date" added?

I got Citavi to add the access date to notes, but I couldn't add an "accessed:" pre-string.

How can I, fit my needs and a) add the access date straight after the author (in braces)
Deutsche Börse AG (07.01.2002): Deutsche Börse - Die verschiedenen Indizes, http://www.exchange.de/fwb.indices.html.

or if this is to tough
b) add an accessed string via citavi or latex?
Deutsche Börse AG. 2002. Deutsche Börse - Die verschiedenen Indizes, http://www.exchange.de/fwb.indices.html. Accessed 07.01.2002

I use this LaTeX-Template which uses this *.bst file for transforming bibtex.

Maybe just adding something to the *.bst file is the easiest option?

---

Edit: Following @Micos recommendation I add the corresponding *.bib entry:

@misc{OMG.2014,
 author = {OMG},
 year = {2014},
 title = {{About the Object Management Group}},
 url = {http://www.omg.org/gettingstarted/gettingstartedindex.htm},
 keywords = {technology standards consortium;technology standards;MDA;UML;CORBA;Unicode;ISO PAS;ITU-T;Heathcare;Legal;Life Sciences Research;Government;Finance;C4I;Robotics;technical meetings;tutorials;specifications;computer technology},
 note = {05.10.2014}
}

Answer 1

It looks like the bibliography style file ormsv080.bst was created with the makebst utility. As such, it is unfortunately not programmed to recognize -- and will therefore ignore -- a field named, say, last-accessed-date or access-date.

If you want to stick with this particular bibliography style, you'll need to change the field

note = {05.10.2014}

to

note = {Accessed on 05.10.2014}

I'm afraid it's not a good idea to edit the bst file itself to prefix "Accessed on " to the contents of the note field, as the note field can contain just about any kind of information, not just the date a given entry was last accessed on. The good news is that you'll need to make this edit only once (assuming you don't access this site repeatedly, of course).

\documentclass{article}
\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@misc{OMG.2014,
 author = {OMG},
 year = {2014},
 title = {{About the Object Management Group}},
 url = {http://www.omg.org/gettingstarted/gettingstartedindex.htm},
 keywords = {technology standards consortium;technology standards;MDA;UML;CORBA;Unicode;ISO PAS;ITU-T;Heathcare;Legal;Life Sciences Research;Government;Finance;C4I;Robotics;technical meetings;tutorials;specifications;computer technology},
 note = {Accessed on 05.10.2014}
}
\end{filecontents*}
\bibliographystyle{ormsv080}
\usepackage{natbib,url}
\begin{document}
As argued by \cite{OMG.2014}, \dots
\bibliography{\jobname}
\end{document}

Answer 2

You can skip filecontents using the following format

@misc{ABC,
 title = {{ABCD} My name is John Doe},
  howpublished = {\url{https://www.google.com}}, 
  year   = "2019 (accessed July 1, 2019)"
  }