The Billboard Hot 100 is a list of the current most popular music made by Billboard magazine. Rankings are based on radio play and sales; the tracking week for sales is each Monday to Sunday, while for radio play it is Wednesday to Tuesday. A new chart is made and officially released to the public by Billboard on Thursday. Each chart is dated with the "week-ending" date of the Saturday two weeks after. Example:
- Monday, January 1 – sales tracking-week begins
- Wednesday, January 3 – airplay tracking-week begins
- Sunday, January 7 – sales tracking-week ends
- Tuesday, January 9 – airplay tracking-week ends
- Thursday, January 11 – new chart released, with issue date of Saturday, January 20.
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