In Japan, most of schools and companies commence their new year on April 1st. So the Japanese often make a clean start and get a little serious on that day. Partially because of that, some Japanese people don’t recall that the day is April Fools’ Day.
But in other countries, particularly in the United States, there seems a stronger tendency that lots of companies publish their own April Fools’ Day news on the Internet, and people play them on friends and colleagues. For example, some of them compete with one another and give rank to those jokes on the Internet.
Some Google’s hoaxes sound funny, and I wonder if they really enjoy and only half believe those. I will write down a link to Wikipedia which I referred to.