create stored proc in sql from mysql

I have a mysql stored procedure I want to turn into a sql stored procedure
how would it be done?

CREATE PROCEDURE fill_calendar(mystart_date DATE, end_date DATE)
BEGIN
  DECLARE crt_date DATE;
  DECLARE Yr INT;
  DECLARE Mo INT;
  SET crt_date = start_date;
  SET Yr= Year(mystart_date);
  SET Mo= Month(mystart_date);
  
  WHILE crt_date < end_date DO
  
    INSERT INTO calendar(Yr,Mo) VALUES(Yr,Mo);
    
    SET crt_date = DATE_ADD(crt_date, INTERVAL 1 MONTH);
    SET Yr= Year(crt_date);
  SET Mo= Month(crt_date);
  END WHILE;

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