Arrow, Black Lightning, & Supernatural Finale Dates

The CW has announced that the series (season in the case of Black Lightning) finales of Arrow, Black Lightning, and Supernatural will air on January 28, March 9, and May 18, respectively. The Arrow finale will be preceded at 8 o'clock by a "finale preview" (whatever that means). Additionally, Supernatural will move to Mondays at 8pm staring on March 16. The press release did not mention Batwoman, Supergirl, or The Flash.