Hi maillawale
As I mentioned above, the date is included in the logo.
It's declared in this CSS file: /templates/ja_vintas/css/template.css
At approx line 916:
h1.logo a {
background: url(../images/logo.png) no-repeat left;
display: block;
width: 271px;
height: 33px;
}
Now, there are 2 ways to change the logo:
1 - Replace the logo: /templates/ja_vintas/images/logo.png by your own logo with the same name 'logo.png'
2 - If you want to use another logo image name, you will check above css rule and change the logo name in the background url as you can see above.
Then clear JAT3 cache.