The U.S. Census is conducted every ten years, and it officially begins on April 1st. This date is designated as Census Day, when all households are encouraged to respond to the census. The data collected helps determine the allocation of congressional seats and federal funding.
The first US census was in 1790.
Depending on WHICH CENSUS you are talking about. if it's the 2010 Census, its late January - March. It arrives in the mail, then you fill it out accordingly.
is taken up to the end of last month of first quarter.,
See website: Japan, National Census Statistics
July
in December
febuary
October 21
in December
Second month
2007. Not sure what month
In a month