Yes, today is All Hallows' Eve (also known as Halloween), but did you know tomorrow, Friday, November 1, is All Saints Day? (Also known as All Hallows) Click here to read more about All Saints' Day. Yes, today is All Hallows' Eve (also known as Halloween), but did you know tomorrow, Friday, November 1, is All Saints Day? (Also known as All Hallows) Click here to read more about All Saints' Day. 