Q. What night is Halloween night? A: The night of October 31. (e.g. the evening beginning October 31 through midnight November 1)
Q: Some answers to questions about definitions for various Halloween related words:
• Allhallows/Allhallow is All Saints' Day, November 1st.
• All Hallows Eve = Halloween, Oct. 31st The evening before Allhallows.
• Allhallowmas is the feast of All Saints.
• Allhallown means of or pertaining to the time of Allhallows. "Allhallown summer." i. e., late summer; "Indian Summer".
• Allhallowtide: The time at or near All Saints, or November 1st. The evening preceding Allhallows or All Saints' Day.
• Hallowmas [See Mass, the eucharist.]: The feast of All Saints, or Allhallows.