What are the impacts of the stand of the 300 spartans at the battle of thermopylae ?

First off it wasn't just the 300 Spartans it was around 7 to 8 thousand strong army of allied Greek city states that battled at Thermopylae for about 7 to 8 days inflicting heavy physical and moral damage on the Persians however in the end King Leonidas ordered a full retreat because a local had betrayed them and told the Persians of a mountain pass that they could use to flank the Greeks, however King Leonidas and his rear guard of around 300 Spartans, 700 Thespians and 400 Thebans as well as an odd assortment of other troops stayed to halt the advance. In the end King Leonidas and his rear guard were slaughtered but they did buy enough time for the rest of the forces to fully retreat and King Leonidas death galvanized the rest of Sparta to rally with the other Greek city states to defeat the Persians. 

1920 census

the census was scheduled for january the 1st, as the government believed that more farmers would be in their homes by that time instead of april. the census did not ask about unemployment, the number of children, and how long was a couple married were not taken into consideration. individuals were considered as residents of the places they normally slept, not the places were they worked at or visited.

2010 census

the census was scheduled for april 1st, 2010. it was the shortest census in history: it only contained 10 questions related to name, age, gender, ethnicity, relationship, and whether the citizen owned a home or rented one. the government launched a website in order to provide the citizens with information regarding the census. there were also "teach census weeks" in schools nationwide.