Gallup's daily tracking polls, which offer a +-4% margin of error, are based of 1000 data points (insert complaint about appeal to authority here). While 365 is

Gallup's daily tracking polls, which offer a +-4% margin of error, are based of 1000 data points (insert complaint about appeal to authority here). While 365 is significantly lower than that, there is nothing wrong with using the data to produce a value and a margin of error/confidence.