CREATE TABLE table_24988 ("Year" FLOAT, "Date" TEXT, "Driver" TEXT, "Team" TEXT, "Manufacturer" TEXT, "Laps" TEXT, "Miles  ( km ) " TEXT, "Race Time" TEXT, "Average Speed  ( mph ) " TEXT, "Report" TEXT)

In how many different years did the race happen on February 27?
SELECT COUNT("Year") FROM table_24988 WHERE "Date" = 'February 27'
SELECT COUNT("Year") FROM "table_24988" WHERE "Date" = 'February 27'