National Census Day - April Fool

What kind of administrator picked April Fool's Day for National Census Day? A well-paid one; right? Why didn't he make a real joke out of it and pick April 15? Or February 2?

Apparently, you don't have to wait until April 1 to mail in your census form. That day is "merely" the day-of-record for answering the questions on the form.

So, don't worry about being picked up by Census agents or I.C.E., if you have already mailed in your form.

Yesterday brought a postcard to my door, reminding me to respond. That's three pieces of mail - so far.

1. A letter telling me to expect the census form;
2. the form; and now
3. the postcard.

How many more mailings will there be?