Thank you all for your replies.
For all who think it is useless and suggest an internet site... it is sooo easy in Trilian that you only need to open the contact list to see the most important times to you. Call me lazy, but opening a web page just takes more time...
CookieRevised: of course I don't want to type clock commands all the time and I don't want it to appear in a chat session for a contact to see. It would be just for me in the main contact list or on a tab page. Thanks for the tip to TabServe, I already tried making my own tab page with an outline I had for msn6, but then found that the .xml file does not exist anymore in msn7. So I'll try TabServe.
TheBlasphemer: it would be nice if your contacts time could be displayed next to their name in the ocntact list and in a chat window
Thanks again all