CREATE TABLE table_36958 ("Outcome" TEXT, "Date" TEXT, "Location" TEXT, "Surface" TEXT, "Opponent in final" TEXT, "Score" TEXT)

Name the date for clay surface and location of santos, brazil
SELECT "Date" FROM table_36958 WHERE "Surface" = 'clay' AND "Location" = 'santos, brazil'
SELECT "Date" FROM "table_36958" WHERE "Location" = 'santos, brazil' AND "Surface" = 'clay'