The final add dates for 2018 will be Monday, December 10 and Tuesday, December 11, 2018

The final Mediabase Published charts of 2018 using recurrent rules will be Sunday, December 16.

Mediabase charts will post on the website Sunday, December 23 and Sunday, December 30, however recurrents will not be processed on those dates.  

The first Mediabase Published charts of 2019 with recurrents removed will post on Sunday, January 6. Songs eligible for recurrent status on the January 6, 2019 Published chart will be reviewed, as holiday airplay may affect trending and will be subject to Chart Editor discretion.

Addboard will reopen on Wednesday, January 2, with the first add deadlines of 2019 being Monday, January 7 and Tuesday, January 8.