how to remove calendar from main menu

is possible to remove calendar from main menu forum invision

i try this code but not working

Code:

a.mainmenu[href="/faq"] {
    display: none;
}
a.mainmenu[href="/calendar"] {
    display: none;
}

or may its wrong

Please, adress of site.

http://testkolang.action-24.com/

i'v found it

Code:

a.mainmenu[href="/calendar"]{
display: none !important;
}

topic solve

zenzo, thank you for posting the solution

Topic Solved & Locked