(a) Yes. (b) No.
As a matter of fact, our lawmakers have introduced several new taxes on April Fool’s Day over the years.
My favourite is the Harmonized Sales Tax in my home province British Columbia. It was introduced on April 1st, 2009, and taken away on April 1st, 2013. The details of the tax are unimportant now but at the time both the details and the date of introduction caused a public outcry.
Our question looking back is, “Why April Fool’s Day?” The answer is that in some countries, including Canada, the government fiscal year starts on April 1st. Thus any large change like a new tax is often made to coincide with that day.
A logical explanation but still a good reason to laugh bitterly when a new tax is introduced.