Floating Timeline

The Floating Timeline is a form of keeping the plot the same. Used for the Simpsons and other animated shows.

Meaning
The Floating Timeline is a way to keep the show going despite past events. Characters' ages never change even with the world moving forward, while the dates of certain events, such as birthdays, do.

Timeline Discrepancies

 * Lisa Simpson's future: Lisa's Wedding - Set in 1995, its future takes place in 2010, where Lisa is said to be 23 years old. However, the latter portion of Season 21 and the former portion of Season 22 and the end of The Burns and the Bees from Season 20 are said to take place in 2010, and yet, Lisa is still eight years old. Boy Meets Curl also has the Simpsons going to the 2010 Winter Vancouver Olmpics in Canada.
 * Homer and Marge's past - That '90s Show - Set in 2008, its flashbacks take place on or after December 7, 1995, before Bart is born. However, episodes 9-13 of Season 1 to the former portion of Season 11 take place in the 1990s.
 * Lisa's First Word - Set in 1992, its flashbacks take place in the spring of 1983 and the summer of 1984, where Bart is two years old. However, Bart was said to be born on 1980, so he should be three - four during that time.
 * Lisa's Sax - Set in 1995, it is said that in 1990, Bart was five years old, and Lisa was three. However, Season 1 and the former portion of Season 2 take place in 1990, with Bart being nine until 1992 and Lisa is seven until 1991.
 * Bart and Lisa's future: Future-Drama - Set in 2005 it depicts eight years into the future (2013). It says Lisa is sixteen (but a senior in high school) and Bart is eighteen and also a senior in high school. However, the latter portion of Season 24 and the former portion of Season 25 still take place in 2013 and Lisa is still eight and Bart is still ten.
 * Bart Simpson's future: Bart to the Future - set in 2000 it has a future set in 2030, but the latter portion of Season 41 and the former portion of Season 42 will take place in 2030 if those seasons ever come.
 * The Simpsons' future: Holidays of Future Passed - set in 2011 it has a future set in 2041, but the latter portion of Season 52 and the former portion of Season 53 will take place in 2041 if those seasons ever come.

Birth Year Discrepancies

 * Seymour Skinner's past - Seymour Skinner served in the Vietnam War as early as 1966. In 2012, he would be born, at the latest, on 1979. In 2013, the latest year he would be born in would be 1980.
 * Abraham Simpson's past - Abraham Simpson fought in WWII and, at the age of eight, lied about his age and enlisted in the Army to fight in WWI. In 2012, he would be born in 1929, making him only ten - sixteen during WWII and not even born before WWI. In 2013, he would be born in 1930, making him nine - fifteen years old during WWII. In 1990, he would be born in 1907, making him 32 - 38 years old during WWII and 7 - 11 during WWI.
 * Kearney Zzyzwicz's past - According to Seymour Skinner in Lisa the Iconoclast, Kearney is old enough to remember America's bicentennial (which is 1976). The episode aired in 1996, so Kearney would be three years old in 1976. Without the Floating Timeline in 1990, he would've been nine. However, in 2013, he would be born in 1993, seventeen years after the bicentennial.

Without Floating Timeline (1990)

 * Homer Simpson- 1954
 * Marge Simpson- 1956
 * Bart Simpson- 1980
 * Lisa Simpson- 1982
 * Maggie Simpson- 1989
 * Abraham Simpson- 1907
 * All of Edna Krabappel's Students- 1980/1
 * All of Audrey McConnell's Students- 1981/2
 * All of Elizabeth Hoover's Students- 1982/3
 * Ned Flanders- 1930
 * Lenny Leonard- 1954
 * Carl Carlson- 1954
 * Professor Frink- 1950
 * Comic Book Guy- 1948
 * Clancy Wiggum- 1950
 * Mary Bailey- 1923
 * Moe Szyslak- 1943
 * Jimbo Jones- 1974
 * Kearney Zzyzwicz- 1970
 * Dolph Starbeam- 1977
 * Timothy Lovejoy- 1952
 * Helen Lovejoy- 1961
 * Hans Moleman- 1949
 * Patty and Selma Bouvier- 1946
 * Apu Nahasapeemapetilon- 1948-1953
 * Seymour Skinner- 1953
 * Mayor Joe Quimby- 1943-1948

With Floating Timeline in 2013

 * Homer Simpson- 1979
 * Marge Simpson- 1981
 * Bart Simpson- 2003
 * Lisa Simpson- 2005
 * Maggie Simpson- 2012
 * Abraham Simpson- 1930
 * All of Edna Krabappel's Students- 2003/4
 * All of Audrey McConnell's Students- 2004/5
 * All of Elizabeth Hoover's Students- 2005/6
 * Ned Flanders- 1953
 * Lenny Leonard- 1977
 * Carl Carlson- 1977
 * Professor Frink- 1973
 * Comic Book Guy- 1971
 * Clancy Wiggum- 1973
 * Mary Bailey- 1946
 * Moe Szyslak- 1966
 * Jimbo Jones-  2000-2001
 * Kearney Zzyzwicz- 1993
 * Dolph Starbeam- 2000
 * Timothy Lovejoy- 1975
 * Helen Lovejoy- 1984
 * Hans Moleman- 1972
 * Patty and Selma Bouvier- 1969
 * Apu Nahasapeemapetilon- 1971-1976
 * Seymour Skinner- 1980
 * Mayor Joe Quimby- 1966-1971

With Floating Timeline in 2014

 * Homer Simpson- 1980
 * Marge Simpson- 1982
 * Bart Simpson- 2004
 * Lisa Simpson- 2006
 * Maggie Simpson- 2013
 * Abraham Simpson- 1931
 * All of Edna Krabappel's Students- 2004/5
 * All of Audrey McConnell's Students- 2005/6
 * All of Elizabeth Hoover's Students- 2006/7
 * Ned Flanders- 1954
 * Lenny Leonard- 1978
 * Carl Carlson- 1978
 * Professor Frink- 1974
 * Comic Book Guy- 1972
 * Clancy Wiggum- 1974
 * Mary Bailey- 1947
 * Moe Szyslak- 1967
 * Jimbo Jones-  2001-2002
 * Kearney Zzyzwicz- 1994
 * Dolph Starbeam- 2001
 * Timothy Lovejoy- 1976
 * Helen Lovejoy- 1985
 * Hans Moleman- 1973
 * Patty and Selma Bouvier- 1970
 * Apu Nahasapeemapetilon- 1972-1977
 * Seymour Skinner- 1981
 * Mayor Joe Quimby- 1967-1972

With Floating Timeline in 2015

 * Homer Simpson- 1981
 * Marge Simpson- 1983
 * Bart Simpson- 2005
 * Lisa Simpson- 2007
 * Maggie Simpson- 2014
 * Abraham Simpson- 1932
 * All of Edna Krabappel's Students- 2005/6
 * All of Audrey McConnell's Students- 2006/7
 * All of Elizabeth Hoover's Students- 2007/8
 * Ned Flanders- 1955
 * Lenny Leonard- 1979
 * Carl Carlson- 1979
 * Professor Frink- 1975
 * Comic Book Guy- 1973
 * Clancy Wiggum- 1975
 * Mary Bailey- 1948
 * Moe Szyslak- 1968
 * Jimbo Jones-  2002-2003
 * Kearney Zzyzwicz- 1995
 * Dolph Starbeam- 2002
 * Timothy Lovejoy- 1977
 * Helen Lovejoy- 1986
 * Hans Moleman- 1974
 * Patty and Selma Bouvier- 1971
 * Apu Nahasapeemapetilon- 1973-1978
 * Seymour Skinner- 1982
 * Mayor Joe Quimby- 1968-1973