Taking from the start of the 20th century, the 21st of December was on a Friday in 1906, 1917, 1923, 1928, 1934, 1945, 1951, 1956, 1962, 1973, 1979, 1984, 1990, 2001, 2007 and 2012. It will next be on a Friday in 2018 and then 2029.
Friday 31st December 2100. The last year of the 21st century is 2100.
1966 started on a Saturday, and was not a leap year, so 21st October was a Friday.
The last time before 2014 was in 2008, the next time will be in 2025.
During the 21st century, the 16th of February is on a Friday in 2001, 2007, 2018, 2024, 2029, 2035, 2046, 2052, 2057, 2063, 2074, 2080, 2085 and 2091.
There are 183 days between the 21st of June and the 21st of December each year.
21st June is the longest day of the year and 22nd December is the shortest day of the year.
1925 was a common year which started on a Thursday, so 25th December was a Friday.
Taking just the 20th and 21st centuries, the 13th of December is on a Friday in 1901, 1907, 1912, 1918, 1929, 1935, 1940, 1946, 1957, 1963, 1968, 1974, 1985, 1991, 1996, 2002, 2013, 2019, 2024, 2030, 2041, 2047, 2052, 2058, 2069, 2075, 2080, 2086 and 2097.
Good Friday will next fall on March 28 in 2059. Good Friday has previously fallen on March 28 in the years 1766, 1823, 1834, 1902, 1975, 1986 and 1997.
In the United States, the most hours of daylight (sunlight) is on June 21st, also know as the Summer Solstice. The Winter Solstice is on December 21st and is the shorted say of the year (or, the least hours of daylight). The two equinoxes are March 21st and September 21st which is the first day of spring and the first day of fall. In the southern Hemisphere though, everything is flipped so the Summer Solstice is December 21st, the Winter Solstice is June 21st, the Spring Equinox is September 21st and the Fall Equinox is on March 21st. This is all because of the Moon phases.
The first day of Winter always falls on December 21st (Yule). And for the year 2011 December 21st falls on a Wednesday.
December 25, 2025 will be on a Thursday.