04/01/2013 02:56 pm ET | Updated Apr 01, 2013

April Fools Day 2013: San Francisco Gets Into The Act (PHOTOS)

As a general rule of thumb, it's always a good idea to take most of what you read online with a grain of salt. On April 1, that grain of salt should be upgraded to a full shaker.

That extra level of caution goes double for San Francisco residents. With the region's close physical proximity to both irony and the internet, pretty much everything one reads online about the Bay Area on Monday could be part of an elaborate practical joke.

At the same time, given how ridiculous life in Northern California is normally, it's hard to tell exactly who's pulling your leg and who legitimately thinks you'll have a fun time at their internet cat video film festival.

As a helpful guide, we've put together a slideshow of some of the best April Fools Day pranks from Bay Area companies and media outlets:

San Francisco April Fool's Day Gags