20 October 1953 was a Tuesday. I don't know what else to tell you; I could understand why someone might think it should have been a Monday (Gregorian vs. Julian calendars), but I have no idea why anyone would think it should have been a Saturday.
October 24, 1953 fell on a Saturday.
October 17, 1953 fell on a Saturday.
October 3, 1953 fell on a Saturday.
Saturday.
It was a Saturday.
October 20 1956 was a Saturday.
Saturday Saturday
20 October 1962 was a Saturday.
October 20, 1956 was a Saturday.
Saturday
Saturday
It was a Saturday.