This is our day guide for Monday December 15th 2025 which shows you at a glance what's happening on this day around the world. Using the calendar on this page, you can look at a day guide for any day. Why not look up your birthday to see which holidays you share it with?

Observances on December 15th 2025

International Tea Day

International Tea Day ☕

A day to celebrate the most popular drink in the world after water.

Read More
Bill of Rights Day

Bill of Rights Day

Find out the dates, history and traditions of Bill of Rights Day

Read More
Cat Herders Day

Cat Herders Day

Find out the dates, history and traditions of Cat Herders Day

Read More
National Cupcake/ Lemon Cupcake Day

National Cupcake/ Lemon Cupcake Day

Find out the dates, history and traditions of National Cupcake/ Lemon Cupcake Day

Read More

Public Holidays on December 15th 2025

Kingdom Day

Kingdom Day

Commemorates the signing of the Charter of the Kingdom of the Netherlands by Queen Juliana on 15 December 1954.

Read More

← December 14th 2025 | Go to Today | December 16th 2025 →