New Year's is a colloquial term with unclear definition and may refer to:

• New Year, the beginning of the calendar year
• New Year's Eve, the last day of the Gregorian calendar year
  • Hogmanay, Scottish celebration of New Year
• New Year's Day, the first day of the year in the Gregorian calendar

• New Year's Day (disambiguation)
• New Year (disambiguation)
• Happy New Year (disambiguation)
• Up Helly Aa
• New Year's resolution
• Christmas and holiday season