December 2016
The next year in which Christmas day will fall on a Sunday will be in 2016.
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Yes, since 2016 it a leap year Christmas will fall on Friday in '15 and Sunday in '16.
2016
2017
Sunday
Yes, it fell on Sunday in 2011, and because of the leap year in 2016, Christmas will skip Saturday and fall on Sunday!
twice Christmas falls on Sunday in 2016 and 2022, and it skips Sunday in 2028.
December 25, 2025 will be on a Thursday.
Christmas of 2011 was on a Sunday, and including the leap year day, February 29, 2012, the time from Christmas 2011 to Christmas 2012 is 52 weeks and 2 days, which means that Christmas 2012 will fall on the second weekday after Sunday, which is Tuesday.
If the 25th of April is a Sunday, then Christmas Day in the same year is always a Saturday.
Christmas Day is always on the 25th of December and can fall on any day of the week in a normal year or a leap year. So the answer to your question is that in a leap year Christmas Day can be on Sunday, Monday, Tuesday, Wednesday, Thursday, Friday or Saturday.