What observances do you/bloggers change their blog layout/color for?

[leadlungbetty]

On the other hand Google highlights something with the main logo probably once a week at least. And that logo is their entire theme...

True. Depending on what kind of blog you have, it could be a good idea or a bad one.

Personally, I would not want to switch it so often that it is not clear what the primary theme is. And I think a site like Google has branded itself well enough that most people know that alternative logo ideas aren't their corporate logo (with a Halloween theme, for instance). A "mommy blogger" might go with the holidays she celebrates. The one I remembered that is really common is Blog Action Day.

[leadlungbetty]

Not big about posting links but has anyone seen: bloggersunite.org

[Ipstenu]

On the other hand Google highlights something with the main logo probably once a week at least. And that logo is their entire theme...

Actually they very rarely change their theme, and when they do (like the layout for image search or, god forbid, their favicon) people are in uproars. Google's handling of their oft-changing-logo is probably what I'd deem the exception proving the rule. They're not changing their site, they JUST change the logo, and even then, the logo ALWAYS fits with the site.

Also they've ALWAYS done the logo games, so that's expected. If it's not something you always do, or it's not seamless, it's going to raise unhappiness.

(Mind you, I used to complain 'We're NOT Amazon!' a lot. And I argue 'We're not Google!' today :) You have to do what's right for your site, your layout and your visitors. Mine would lynch me if I did something any other day than April 1.)

[andrea_r]

On my personal blog, I change themes all the time.