Although Christmas Day is always celebrated on the 25th of December, the day of the week that this date falls on varies from year to year, as shown in the list given below.
2009: Friday
2010: Saturday
2011: Sunday
2012 (Leap year): Tuesday
2013: Wednesday
2014: Thursday
2015: Friday
2016 (Leap year): Sunday
2017: Monday
2018: Tuesday
2019: Wednesday
2020 (Leap year): Friday
2021: Saturday
2022: Sunday
2023: Monday
2024 (Leap year): Wednesday
2025: Thursday
When Christmas Day happens to be on the weekend, a different day may be officially allocated as a public holiday, depending on where in the world you live.