All about December 21, 2025: Significant Events, Facts, Analysis and Date Notations

Facts about December 21, 2025:

• 21st December, 2025 falls on Sunday which is a Weekend.
• That will be 51st (Fifty-first) week of year 2025.
• It's 354th (Three Hundred Fifty-fourth) Day of the year.
• There are 31 days in the month of December 2025. Checkout the days in other months of 2025 along with days in December 2025.
• Year 2025 has 365 days in total.
• The month December will be 12th month of Year 2025.
• The month December is also known as Desember, Disambar, Dezamber, decembro, Dezember, Decembre, meno mo-bi, Dekembra, desembre, Zecemvar and dekul across the Globe.

• Country-wise Date Representation of December 21 across the World:

  Country Names	Notation of the Date	Long Date Format	Short Date Format
  The United States of America (USA)	MDY (MM-DD-YYYY) (a.k.a. middle-endian) and YMD (YYYY-MM-DD) (a.k.a. big-endian)	December 21, 2025 and 2025 December 21	December 21
  Some U.S. Island Territories	MDY (MM-DD-YYYY) (a.k.a. middle-endian)	December 21, 2025	December 21
  Europe: Italy, Ukraine, Romania, Netherlands, and others North America: Mexico, various Caribbean islands Central America: Guatemala, Honduras, and others South America: Brazil, Colombia, Argentina, Peru, Venezuela, and others North Africa: Egypt, Algeria, Morocco, Tunisia, and others West, Central, and Southern Africa: Nigeria, Ethiopia, DRC, Tanzania, Sudan, Uganda, and others West Asia: Turkey, Iraq, Saudi Arabia, Yemen, and others Central Asia: Tajikistan, Kyrgyzstan, Turkmenistan East and Southeast Asia: Indonesia, Thailand, Cambodia, and others South Asia: Pakistan, Bangladesh Oceania: Australia, Papua New Guinea, New Zealand, and others	DMY (DD-MM-YYYY) (a.k.a. little-endian)	21 December 2025	21 December
  China, Japan, South Korea, North Korea, Taiwan, Hungary, Mongolia, Lithuania and Bhutan	YMD (YYYY-MM-DD) (a.k.a. big-endian)	2025 December 21	December 21
  Bharat (India), Russia, Vietnam, Germany, Iran, France, United Kingdom, Myanmar, Spain, Poland, Uzbekistan, Afghanistan, Nepal, Cameroon, Sri Lanka, others	DMY (DD-MM-YYYY) (a.k.a. little-endian) and YMD (YYYY-MM-DD) (a.k.a. big-endian)	21 December 2025 and 2025 December 21	21 December and December 21
  Philippines, Malaysia, Somalia, Togo, Panama, Puerto Rico, Cayman Islands, Greenland	DMY (DD-MM-YYYY) (a.k.a. little-endian) and MDY (MM-DD-YYYY) (a.k.a. middle-endian)	21 December 2025 and December 21, 2025	21 December and December 21
  South Africa, Kenya, Canada, Ghana	MDY (MM-DD-YYYY) (a.k.a. middle-endian) and YMD (YYYY-MM-DD) (a.k.a. big-endian) and DMY (DD-MM-YYYY) (a.k.a. little-endian)	December 21, 2025 and 2025 December 21 and 21 December 2025	December 21 and 21 December

• Year 2025 will be NOT a Leap Year.
  Note: In a Leap Year there are 366 days (a year, occurring once every four years, which has 366 days including 29 February as an intercalary day.), rest years have 365 days.
• Year 2028 will be the nearest future leap year.