The Billboard Hot 100 is the music industry standard record chart in the United States for songs, published weekly by Billboard magazine. Chart rankings are based on sales (physical and digital), radio play, and online streaming in the United States.
Billboard Year-End charts are a cumulative measure of a single or album’s performance in the United States, based upon the Billboard magazine charts during any given chart year. Billboard’s “chart year” runs from the first Billboard “week” of December to the final week in November, but because the Billboard week is dated in advance of publication, the last calendar week for which sales are counted is usually the third week in November. This altered calendar allows for Billboard to calculate year-end charts and release them in time for its final print issue in the last week of December.