CREATE TABLE table_202_50 (id DECIMAL, "no." DECIMAL, "ritu" TEXT, "season" TEXT, "hindu lunar months" TEXT, "gregorian month" TEXT, "characteristics" TEXT, "seasonal festivals" TEXT)

which ritu has the most seasonal festivals ?
SELECT "ritu" FROM table_202_50 ORDER BY "seasonal festivals" DESC LIMIT 1
SELECT "ritu" FROM "table_202_50" ORDER BY "seasonal festivals" DESC NULLS LAST LIMIT 1